K-12math.info

Most frequently used terms in 21st century (2002-2019) ninth grade (age 14) textbooks

Out of 1000 terms - 398 different terms were used in these ninth grade student materials
average 165 terms were used per textbook (text)


Series information

11. Houghton Mifflin
Textbook series
(2002) United States

12. McGraw-Hill/Glencoe
Textbook series
(2002)United States

13. OpenSTAX/CNX/Siyavula
Open Education Resourse
(2011) South Africa


14. CK-12
Open Education Resourse
(2012) United States


16. McGraw-Hill/Glencoe
Textbook series
(2013) United States

21. Ukuqonda Math
Open Access (OA)
(2017) South Africa


22. NCERT
Open Access (OA)
(2019) India



Code:
USAGE CODE:

4 Term used (formally developed)
3 Term used (to support formal development)
2 Synonym of term used
1 Term used (enrichment)
- Term not present
--- Textbook not available


Range of Terms
(from most frequent)
Textbook series ( Usage Code )
>> Series >>> Houghton
Mifflin
2002/text
USA
McGraw-Hill
2002/text
USA
OpenStax
2011/OER
South Africa
CK-12
2012/OER
USA
McGraw-Hill
2013/text
USA
Ukuqonda Math
2017/OA
South Africa
NCERT
2019/OA
India
ALGEBRAIC EXPRESS. 23 3 344-673-28
BASE (EXPONENT) 33 3 434-463-25
BINOMIAL 44 4 444-684-30
COORDINATE SYSTEM 24 3 243-2194-53
EQUATION 44 4 443-503-44
EXPONENT 34 3 444-463-25
FACTOR (POLYNOMIAL) 33 3 433-1593-35
MONOMIAL 44 4 444-684-30
NEGATIVE EXPONENT 44 3 444-483-25
OPERATIONS (EXPON.) 43 4 442-462-24
POLYNOMIAL 44 3 443-764-28
REAL NUMBER 34 3 434-44-6
TRINOMIAL 44 4 444-684-30
AXES -4 3 443-2194-55
COORDINATE 33 3 4 -4-2194-57
FACTORING POLY.33 -442-1694-41
GRAPHING EQUATION33 3 3 -4-1594-70
GRAPHING QUADRATIC43 -444-1594-70
INTEGER 34 4 4 -4-24-2
IRRATIONAL NUMBER 44 4 4 -4-44-5
LOCATING POINTS GRAPHS23 3 3 -2-2202-61
OPERATIONS ON POLY.33 4 343-77 -
ORDERED PAIR (PLANE)44 -434-1593-68
ORIGIN (PLANE) -4 4 444-2194-54
PARALLEL LINES (EQUATION)44 -444-1244-92
QUADRANT 34 4 4 -4-2194-56
RADICAL SIGN 34 2 3 -2-254-21
RATIO 34 -444-133-3
RATIONAL NUMBER 44 4 4 -4-34-3
SCATTER DIAGRAM 22 2 224-263 -
SCIENTIFIC NOTATION 44 4 444-51 -
SLOPE 44 2 442-199 -
SOLUTION 44 3 344-88 -
SUBSTITUTION 44 3 44 - 3-68
TRUE AND FALSE (EQ.) 33 -333-503-44
VARIABLE -4 1 444-544-28
WORD PROBLEMS (EQUATION)22 4 222-89 -
AVERAGE 44 3 - -3-2543-261
COEFFICIENT (EQ.) 44 -344-68 -
COEFFICIENT (POLY.) 33 -43 - 4-28
CONSTANT (EQUATION)4 - 4 -44-543-28
DEGREE (POLYNOMIAL) 44 -44 - 4-30
DIFF. OF SQUARES -4 3 444-180 -
DISTRIBUTIVE 34 -444-73 -
EXPERIMENTAL PROB. 44 2 -4 - 4-276
FORMULA 44 -344-59 -
FREQUENCY TABLE -4 4 -14-2514-241
FUNCTION 44 -444-63 -
HISTOGRAM -4 4 -34-2594-249
HYPOTNUSE - - 3 444-1363-126
IDENTITY (EQ.) 44 - -44-1654-44
INEQUALITIES 34 1 43 - -
LCD (RATIONAL EXP.) 44 3 44 - -
LINEAR EQUATION 44 -44 - 4-6
MEAN 44 4 - -4-2544-263
MEDIAN 44 3 - -4-2544-265
MODE 44 3 - -4-2544-267
OPERATIONS (RATIONAL)34 3 43 - -
ORDER OF OPERATIONS 44 -442-70 -
ORDERED PAIR (EQ.)33 -3 -4-1593-68
PERCENT 34 -444-14 -
PERPENDICULAR LINES -4 -444-943-173
POWER (EXPONENT)34 3 44 - -
PROBABILITY 44 4 - -4-2814-271
PROBLEM SOLVING (EQ.)14 2 4 -2-182 -
PROPORTION 34 -443-227 -
PYTHAGOREAN THEOREM -4 4 444-136 -
RIGHT TRIANGLE - - 2 343-1103-126
SET -3 3 343-2 -
SIMPLIFYING (RATIONAL)4 - 3 444-174 -
SQUARE ROOT 44 -434-25 -
STANDARD FORM (POLY)4 - 2 444-204 -
STANDARD FORM (EQ.)44 4 4 -4-204 -
SYMBOLS OF GROUPING (EQ.)43 -232-70 -
WHOLE NUMBER -4 3 3 -4-24-2
ADDITION PROPERTY (EQ.)24 -24 - -
AXIS OF SYMMETRY 44 -24 - -
BAR GRAPH 4 - 3 - -4-2574-247
CARTESIAN SYSTEM - - 3 2 -4-2192-54
CENTRAL TENDENCY 44 4 - - - 4-261
COLLECTING (STATISTICS) -3 4 - -4-2494-239
COMPLETING (SQUARE) 44 -44 - -
CONVERSE STATEMENT -4 -33 - 3-153
DEPENDENT VARIABLE -4 -444-160 -
DIRECT VARIATION 44 -44 - -
DISCRIMINANT 41 -44 - -
DIVISION -4 -44 - 4-35
DOMAIN 33 -43 - -
EQ. (2 VARIABLES) 34 3 - - - 4-67
EQUIV. EQUATIONS 44 - -44-85 -
FACTOR 3 - 3 3 -3-48 -
GRAPHING (FUNCTION) 4 - -443-65 -
GRAPHING (GRAPHS) - - 3 2 -4-1594-70
INDEPENDENT VAR. -4 -444-160 -
INTERCEPT 43 -4 -4-204 -
INTEREST -4 4 -34-16 -
INVERSE VARIATION 44 -44 - -
LINE GRAPH 44 2 - -3-262 -
MIXTURE PROBLEMS 34 -44 - -
MOTION PROBLEMS -4 -222-13 -
MULT. PROPERTIES 24 -24 - -
NATURAL NUMBER -4 3 - -4-14-2
NEGATIVE NUMBER 34 - -34-19 -
NOTATION (FUNCTION) 44 -44 - -
ORDERED PAIR (RELATION) 33 -24 - -
PARABOLA 44 -44 - -
PERFECT SQUARE 33 -44 - -
QUADRATIC EQUATION 44 -34 - -
QUADRATIC FORMULA 44 -44 - -
QUADRATIC FUNCTION 44 -34 - -
QUADRATIC POLYNOMIAL 3 - -4 -3-1684-30
RADICAL 34 3 4 - - -
RANGE (FUNCTION) 43 -43 - -
RATIONAL EXPRESSION 14 -34 - -
RATIONAL FUNCTION 44 -44 - -
RECTANGLE (AREA) - - 4 3 -4-1463-153
RELATION 44 -44 - -
SEQUENCE -1 -344-57 -
SIMPLEST FORM (EXP.) - - -334-293-22
SIMPLIFYING (ALG. EXP.)34 3 -4 - -
SLOPE-INTERCEPT 44 -44 - -
SOLVING (INEQ.) 34 -44 - -
STATISTICS - - 4 -43-2554-238
SUBSTITUTION 3 - 3 3 - - 3-68
SYSTEMS (EQUATIONS) 44 -44 - -
SYSTEMS (INEQUAL.) 44 -44 - -
WORD PROBLEM (PERCENT) -2 -222-14 -
WORD PROBLEMS (GRAPHS)2 - -22 - 2-72
ZERO AS AN EXPONENT 4 - 4 4 - - 3-25
ZEROS OF A POLYNOMI 3 - -22 - 4-32
ADDITION (INTEGER) -4 -2 -4-20 -
APPLICATION (PROBABILTY) - - 2 - -2-2272-271
ASSOCIATIVE (EQ.) -4 - -44-73 -
COMBINING TERMS - - 2 3 -4-74 -
COMMUTATIVE (EQ.) -4 - -44-73 -
CONGRUENT TRIANGLES - - 4 - -4-1174-112
CONSTRUCT TRIANGLES - - 2 - -3-1034-192
CUBE ROOT - - -434-25 -
CYLINDER (AREA) - - 4 - -4-2114-214
DEDUCTIVE REASONING 11 - -1 - -
DIAGONAL OF QUAD. - - 3 - -4-1054-139
DISTANCE -4 -4 - - 3-58
DIVISION (INTEGER) -4 - -34-24 -
EQUIVALENT FRACTIONS - - -4 -4-273-3
EXPONENTIAL FORM - - 2 3 -3-46 -
EXPONENTIAL FUNCT. -4 -44 - -
FACTORS (QUADRATIC) 43 - -3 - -
GRAPHING (EQUATION) 4 - -43 - -
GRAPHING (INEQ.) -3 -44 - -
graphing (rational 13 - -3 - -
IF THEN STATEMENT 11 - -3 - -
INDUCTIVE REASONING 11 - -1 - -
LINEAR FUNCTION 3 - -34 - -
MATRIX 41 - -1 - -
METRIC UNITS - - 2 - -2-1462-244
MULTIPLICATION (INTEGER) -4 - -34-22 -
NUMBER LINE (INTEGER) -4 -33 - -
NUMBER LINE (REAL) 33 - - - - 4-15
OPEN SENTENCE 44 - -4 - -
OPERATIONS (RADICAL -4 -44 - -
OPPOSITIES (INTEGER) -4 -3 -3-21 -
PARALLEL LINES - - 3 - -4-1244-92
PARALLELOGRAM (AREA - - 4 - -4-1504-156
PARALLELOGRAM - - 4 - -3-1053-136
PERFECT SQUARE 44 -4 - - -
PERPENDICULAR LINES - - 3 - -4-943-173
POINT-SLOPE FORM 44 -4 - - -
POSITIVE INTEGER 3 - - -3 - 3-8
POSITIVE NUMBER 3 - - - -3-213-21
PRISM (VOLUME) - - 4 - -4-2122-227
PROBABILITY TREE -2 3 - -2-285 -
PROPERTIES (RATIONAL) -3 -3 - - 3-18
PYTHAGOREAN TRIPLES - - 1 -44-142 -
QUADRILATERAL - - 4 - -3-1054-135
RADICAND 43 - -3 - -
RANDOM SAMPLE - - 2 -34-249 -
RATIONALIZING -3 -4 - - 4-23
RECTANGLE - - 4 - -3-1054-138
REFLECTION - - 4 -44-220 -
RHOMBUS - - 4 - -3-1054-138
SIMILAR TRIANGLE 4 - 4 - -4-120 -
SOLUTION SET -2 - -4 - 2-68
SQUARE - - 4 - -3-1054-138
STANDARD FORM - - -444-204 -
SUBTRACTION (INTEGER) -4 -2 -4-21 -
SURFACE AREA - - 4 - -4-2103-209
TABLE FORMAT 3 - 2 3 - - -
THEOREM 4 - - - -4-1364-83
THEORETICAL PROBAB. 34 - -4 - -
THREE DIMENSION - - 3 - -3-2353-80
TRANSLATION - - 4 -42-182 -
TRAPEZIUM - - 4 - -3-1054-137
TWO POINT FORM 4 - - -24-202 -
UNKNOWN -3 -3 -3-104 -
VERTEX (QUADRATIC) 44 -4 - - -
VOLUME - - 3 - -4-2124-226
WORD PROBLEM (RATIO) -2 -22 - -
WORD PROBLEMS (QUAD.) 2 - -2 - - 2-72
WORK PROBLEMS -1 -43 - -
ZERO PROBABILITY 33 4 - - - -
ABSOLUTE VALUE -4 - -3 - -
ABSOLUTE VALUE (EQUATION) 4 - -4 - - -
ADDITION (RATIONAL) -3 -4 - - -
ADDITIVE INVERSE -4 - - -4-3 -
ALGEBRAIC FRACTION - - 2 - -4-172 -
AREA OF TRIANGLE - - 4 - - - 4-199
ASYMPTOTE 4 - - -4 - -
AXIOM 4 - - - - - 4-81
BRACE NOTATION (SET) -3 -3 - - -
CALCULATOR - - 3 3 - - -
CENTIMETER - - 3 - -3-146 -
CIRCLE (AREA) - - -3 -4-148 -
CIRCLE GRAPH -3 2 - - - -
COMBINATION -2 - -4 - -
COMPLEX NUMBER -4 - -3 - -
COMPOUND (INEQ.) -4 -4 - - -
COMPOUND INTEREST - - - -44-17 -
CONCAVE DOWN -2 -2 - - -
CONCAVE UP -2 -2 - - -
CONJUGATE 34 - - - - -
CORRESPONDING PARTS (GEO.) - - 3 - - - 3-111
CORRESPONDING PARTS (TRI.) - - 3 - - - 3-111
COSINE RATIO 4 - - -4 - -
COUNTER EXAMPLE 34 - - - - -
COUNTING NUMBER - - 3 3 - - -
CYLINDER - - 3 - -3-235 -
DENOMINATOR - - -3 -3-29 -
DEPENDENT EQUATIONS - - -44 - -
DISTRIBUTION - - - -4 - 3-255
DIVISION (RATIONAL) -4 -4 - - -
DOMAIN (RELATION) -4 - -4 - -
DOUBLE BAR GRAPH - - 2 - -4-257 -
EXTREMES AND MEANS 4 - - -4 - -
FACTOR (WHOLE) -3 - - -3-11 -
FACTOR TREE -3 -3 - - -
FAHRENHEIT SCALE - - 3 3 - - -
FRACTION - - -3 -3-27 -
FRACTIONAL EXPONENT - - -42 - -
FUNCTION MACHINE - - -3 -2-64 -
GCF (POLYNOMIAL) -4 -4 - - -
GCF (NUMBERS) -4 - - -2-11 -
GRAPH (STATISTICS) - - 3 - -4-269 -
GRAPHING RELATIONS -3 -2 - - -
GRAPHS OF FUNCTIONS - - - -34-198 -
HYPOTHESIS 11 - - - - -
IMPROPER FRACTION - - -4 -4-30 -
INCONSISTENT EQ. - - -44 - -
ISOSCELES TRIANGLE - - 3 - - - 4-121
KILOMETER - - 3 - -3-146 -
LCM (FRACTION) - - -3 -4-31 -
LENGTH - - 3 - -3-227 -
MULTIPLICATION (RATIONAL) -4 -4 - - -
MULTIPLICATIVE INVERSE -4 -4 - - -
NEGATIVE INTEGER 3 - - - - - 3-2
NETS (POLYHEDRON) - - 2 - -4-237 -
NON-LINEAR FUNCTION - - - -44-208 -
NUMERATOR - - -3 -3-29 -
ORDERING (RATIONAL) -3 -3 - - -
ORDINATE - - -4 - - 4-57
PENTAGON - - 4 - -3-105 -
PERCENT NOTATION -3 - - -4-14 -
PERMUTATION -1 - -4 - -
PIE APPROACH - - -2 -4-260 -
POLYGON - - 4 - -3-107 -
POLYHEDRON - - 3 - -4-235 -
POSTULATE 4 - - - - - 4-81
PRIME POLYNOMIAL 4 - - -4 - -
PRISM (AREA) - - 3 - - - 2-209
PROPERTIES (REAL) 3 - - - - - 3-18
PROPERTIES (EQUATIONS) - - -3 - - 2-44
RANGE (RELATION) -4 - -4 - -
RANGE (STATISTICS) -4 - - -4-254 -
RATE OF INTEREST -2 3 - - - -
RECIPROCAL -4 -4 - - -
RECTANGULAR PRISM - - 3 - -3-235 -
RELATION AND FUNCTION 3 - -4 - - -
REPEATING DECIMAL - - 3 - - - 2-10
RULE (FUNCTION) 2 - -3 - - -
SAMPLE SPACE -4 - - -2-280 -
SINE RATIO 4 - - -4 - -
SOLUTION SET -3 - - - - 2-68
SOLVE (ELIMINATION) -4 -4 - - -
SQUARE (AREA) - - 4 - -4-146 -
SUBTRACTION (RATIONAL) -3 -2 - - -
TANGENT RATIO 4 - - -4 - -
TERMINATING DECIMAL - - 3 - - - 4-10
TRANSLATION - - -3 -2-182 -
TRAPIZOID (AREA) - - -3 - - 2-156
TRIANGLE - - 3 -3 - -
TRIANGULAR PRISM - - 3 - -3-235 -
TRIGONOMETRY 4 - - -4 - -
WORD PROBLEM (RATIONAL NUM.) 2 - -2 - - -
ZEROS OF FUNCTION -4 -4 - - -
ABSCISSA - - -4 - - -
ACCURACY - - - -1 - -
ADDITION (REAL) 4 - - - - - -
ALTITUDE (TRIANGLE) - - 2 - - - -
APPLICATIONS (EXPONENT) - - -3 - - -
APPLICATIONS (FUNCTION) - - -2 - - -
APPROXIMATION - - -3 - - -
ARITHMETIC PROGRESSION - - -4 - - -
BASE (TRIANGLE) - - 3 - - - -
BROKEN LINE - - - -2 - -
CENTIGRADE SCALE - - -2 - - -
COMPLETE FACTORIZATION -2 - - - - -
COMPLEX FRACTION - - - -4 - -
COMPOSITE NUMBER -4 - - - - -
CONDITIONAL STATMENT -1 - - - - -
CONGRUENT POLYGONS - - 2 - - - -
DECIMETER - - 3 - - - -
DEFINITION - - 4 - - - -
DIFF. OF 2 SQUARES 3 - - - - - -
DIVISION (REAL NUMBER) 4 - - - - - -
DOMAIN - - - -3 - -
DOMAIN -3 - - - - -
ELEMENT (SET) - - - -4 - -
ENGLISH UNITS - - 2 - - - -
EQUATION OF A LINE - - 4 - - - -
EQUILATERAL TRIANGLE - - 4 - - - -
EQUIV. INEQUALITIES 4 - - - - - -
ESTIMATION (DECIMAL) - - 3 - - - -
EVEN POWER - - -3 - - -
EXTRANEOUS ROOTS - - -4 - - -
FACTORIAL - - - -4 - -
FACTORIAL NOTATION - - - -4 - -
FLOW CHART - - 2 - - - -
FLOW DIAGRAM METHOD 3 - - - - - -
FORMULA (COMB.) - - - -4 - -
FORMULA (PERM.) - - - -4 - -
FRACTIONAL EQUATION - - -2 - - -
GEOMETRIC PROGRESSION - - -2 - - -
GEOMETRIC SERIES - - - -2 - -
GOLDBACH CONJECTURE 4 - - - - - -
GREATER THAN (FRACTION) - - -3 - - -
HALF PLANE - - -3 - - -
HISTORICAL DEVEL. - - 2 - - - -
HYPERBOLA 4 - - - - - -
HYPOTNUSE (TRIG.) 3 - - - - - -
IMAGINARY SOLUTIONS - - -3 - - -
INDEPENDENT EQ. - - - -4 - -
INDIRECT PROOF 4 - - - - - -
INEQUALITY (INTEGER) - - -2 - - -
INTERPRETATION - - 2 - - - -
INVERSE FUNCTION - - - -2 - -
JOINT VARIATION - - -4 - - -
LCD (FRACTION) - - -4 - - -
LEADING MONOMIAL - - -2 - - -
MAPPING (FUNCTION) -3 - - - - -
MIDPOINT - - -4 - - -
MONEY - - 4 - - - -
MULTPLICATION (REAL) 4 - - - - - -
NAMING OF POLYGONS - - 3 - - - -
NEGATIVE RATIONAL NUM. -2 - - - - -
NORMAL DISTRIBUTION - - - -1 - -
N-TH ROOT - - - -3 - -
NUMBER LINE (FRACTION) - - -4 - - -
NUMBER LINE (RATIONAL) -3 - - - - -
NUMBER PHRASE -2 - - - - -
OPPOSITIES (REAL) 4 - - - - - -
PERIMETER (QUAD.) - - -2 - - -
PERSPECTIVE - - 3 - - - -
PLANE - - -3 - - -
POLYNOMIAL FUNCTION - - -3 - - -
PRIME NUMBER -4 - - - - -
PRINCIPAL -3 - - - - -
PROPER FRACTION - - -4 - - -
PROTRACTOR - - 3 - - - -
QUADRATIC INEQ. 4 - - - - - -
RANGE -3 - - - - -
RECIPROCAL (REAL) 4 - - - - - -
REGULAR POLYGON - - 4 - - - -
REGULAR POLYHEDRON - - 4 - - - -
RIGHT PRISM - - 3 - - - -
ROTATION - - 4 - - - -
ROUNDING - - -3 - - -
ROUNDING DECIMALS - - 3 - - - -
SCALE DRAWING -4 - - - - -
SIGNIFICANT FIGURES - - -4 - - -
SIMILAR POLYGONS - - 3 - - - -
SIMPLIFICATION - - -3 - - -
SIMULTANEOUS EQ. - - 3 - - - -
SOLVING POLYNOMIALS - - -4 - - -
SQUARE NUMBER -1 - - - - -
STANDARD DEVIATION - - - -4 - -
SUBSET -3 - - - - -
SUBTRACTION (REAL) 4 - - - - - -
SUM OF ANGLES - - 2 - - - -
SYMMETRY - - 3 - - - -
THREE VARIABLES 3 - - - - - -
TIME - - 3 - - - -
TRANSFORMATION - - - -4 - -
TRIANGLE NUMBERS -1 - - - - -
UNARY OPERATION 4 - - - - - -
VENN DIAGRAM (SET) -3 - - - - -
VOLUME FORMULAS - - 2 - - - -
WORD PROBLEM (FUNCTION)2 - - - - - -
Y-FORM 2 - - - - - -
ZERO PRODUCT THEOREM -2 - - - - -

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