year 8 maths

400 Chapter 7 Linear relationships 1
1 This graph shows the relationship between age and height of two people.
Pre-test
Height
Amanda
Age
George
a Who is older? b Who is taller?
2 Write the x -coordinate for these points.
a (1, 2) b (1, 5)
c (0, −1) d (−3, 0)
3 Write the y -coordinate for these points.
a (1, 6) b (−4, −1) c (−3, 0) d (−4, 2)
4 The coordinates of the point A on this graph are (2, 3) . What are the coordinates of these points?
3
2
1
O
y
B
1
A
C
2 3
D
x
a B b C c D
5 If y = x + 4 , find the value of y when:
a x = 3 b x = 0 c x = −2
6 If y = −2x − 3 , find the value of y when:
a x = 2 b x = 0 c x = −3
7 Complete the tables for the given rules.
a y = 3x − 2 b y = −x + 4
x −2 −1 0 1 2
y
x −2 −1 0 1 2
y
8 Find the rule for these tables of values.
a
x 0 1 2 3 4
y 0 3 6 9 12
b
x −1 0 1 2 3
y −1 1 3 5 7
c
x −3 −2 −1 0 1
y −11 −8 −5 −2 1
d
x 0 1 2 3 4 5
y 5 4 3 2 1 0
Cambridge Maths NSW
Stage 4 Year 8 Second edition
ISBN 978-1-108-46627-1 © Palmer et al. 2018
Cambridge University Press
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