Page 199 - MAT KS3 Y8 Cambridge CheckPoint

Glossary and index

degree of accuracy the level of accuracy factor a whole number that will divide
in any rounding 36, 62 into another whole number without a
derive construct a formula or work remainder; 6 and 8 are factors of 24 11
out an answer 27 factor tree a diagram used as a method
diagonal a line segment joining for finding prime factors 13
non-adjacent vertices of a polygon 88 formula (plural formulae) an equation
diameter a line segment between two that shows the relationship between two
points on the circumference of a circle or more quantities 27
(or on the surface of a sphere) that passes frequency table a table that lists the
through its centre 120 number of times a specific value or item
direct proportion two or more quantities occurs in a set of data (its frequency) 66
are in direct proportion if, when one increases function a relationship between two sets
or decreases so does the other, with the ratio of numbers 24
of the quantities staying the same 145 function machine a diagram that shows

discrete data data that can only take the steps in a function 24
specific, exact values, but cannot have highest common factor (HCF) the largest
in-between values 65 number that is a factor of two or
enlargement a transformation that more numbers 11
increases the size of a shape to produce a hypotenuse the side opposite the right
mathematically similar image 158 angle, in a right-angled triangle 84
equal class intervals class intervals, image a shape after a transformation 158
in grouped data, that are all the same size 66
improper fraction a fraction in which the
equation two different mathematical numerator is larger than the denominator 75
expressions, both having the same value,
increase make or become larger or
separated by an equals sign (=); also a way
greater in number 113
of labelling a straight line on a grid 24, 30
index (plural indices) a number used to
equivalent calculation a calculation that show a power; in 3 , 4 is the index 15, 32
4
gives the same answer 39
input a number to be acted upon by
expand (brackets) multiply all parts of the
a function 24
expression inside the brackets by the term
alongside the brackets 98 integer a number from the set of whole
numbers …, −3, −2, −1, 0, 1, 2, 3, … 8
experiment a repeatable process, such
as rolling a dice 62 interview a conversation in which one
person (the interviewer) asks another
experimental probability a probability (the interviewee) questions 62
estimated from data collected in an
experiment 154 inverse the operation that has the opposite
effect; the inverse of ‘add 5’ is ‘subtract 5’ 8
expression a collection of symbols
representing numbers and mathematical kilometre (km) one thousand
operations, but not including an equals metres (1000 m) 47
sign (=) 26 length measurement of a line, usually
external angle an angle outside a triangle, in metres 45
or other polygon, between an extended side line graph a series of points that are joined
and the side next to it 54 by straight lines 184

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