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632

Exercise 7B

1 a 5 b 7 c 3 d 1

e −7 f −11 g 25 h −21

2 a 2 b −2 c −13

3

4 a

b

c

d

e

f

g

h

2

O

−3 −2 −1 1 2 3

−2

−4

−6

y

x −3 −2 −1 0 1 2 3

y −2 −1 0 1 2 3 4

x −3 −2 −1 0 1 2 3

y −5 −4 −3 −2 −1 0 1

x −3 −2 −1 0 1 2 3

y −9 −7 −5 −3 −1 1 3

x −3 −2 −1 0 1 2 3

y −5 −3 −1 1 3 5 7

x −3 −2 −1 0 1 2 3

y 9 7 5 3 1 −1 −3

x −3 −2 −1 0 1 2 3

y 8 5 2 −1 −4 −7 −10

x −3 −2 −1 0 1 2 3

y 3 2 1 0 −1 −2 −3

x −3 −2 −1 0 1 2 3

y 7 6 5 4 3 2 1

5 a i yes ii no

b i no

c i no

d i yes

e i yes

f i yes

g i no

x

ii yes

ii no

ii yes

ii no

ii yes

ii yes

6 a

b

c

d

3

2

1

−3 −2 −1

O

−1

1 2 3

−2

−3

−3 −2 −1

O

1 2 3

−2

−4

y

y

2

y

6

4

2

−3 −2 −1

O

−1

1 2 3

y

10

8

6

4

2

−3 −2 −1

O

−2

1 2 3

−4

−6

−8

−10

7 a (−1, 0), (0, 1) b (2, 0), (0, 2)

c (−2, 0), (0, 4) d (2, 0), (0, 10)

e (1.5, 0), (0, −3)

f

7

( 3 , 0 , (0, 7)

)

8 (1, 3)

9 a 2

b i

y

3

2

1

x

−3 −2 −1

O

−1

1 2 3

−2

−3

x

x

x

x

Cambridge Maths NSW

Stage 4 Year 8 Second edition

ISBN 978-1-108-46627-1 © Palmer et al. 2018

Cambridge University Press

Photocopying is restricted under law and this material must not be transferred to another party.

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