year 8 maths

Semester review 2 595
2 a Complete these tables of values.
i y = 2x + 1
x 0 1 2 3
y
ii
y = 4 − x
x 0 1 2 3
y
b Sketch each line on the same number plane and state the point of intersection of the
two lines.
3 Consider the table of values:
x 0 1 2 3 4
y −6 0 6 12 18
Complete this sentence: To find a y value, multiply x by ___________, then __________
_________.
4 Find the rule for this table:
x 0 2 4 6
y 3 4 5 6
5 Sketch the curves y = x 2 and y = 2x on the same number plane, by first completing a table
of values with x from −2 to 3 . Write down the point of intersection of the two graphs in the
first quadrant.
Extended-response question
y
y = 1 − x
−6 −5 −4 −3 −2
6
5
4
3
2
1
−1
O
−1
−2
−3
−4
−5
−6
y = 5 − 2x
1 2 3 4 5 6
x
a Use the appropriate line on the graph above to find the solution to the following equations.
i 1 − x = 5 ii 1 − x = 3.5 iii 5 − 2x = 3
iv 5 − 2x =−2 v 1 − x =−5
b Write the coordinates of the point of intersection of these two lines.
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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