Cambridge Additional Mathematics

Straight line graphs (Chapter 7) 189

EXERCISE 7D

1 Findyin terms ofx:

abc

de f

2 For each of the following relations:

i findyin terms ofx ii find the value ofywhen x=3.

abc

de f

y

O x 4

(2 1),

(5 -2),

y

~`x

O

(2 5),

-1

y

O x 3

(6 5),

2

y

O 2 x

(3 1),

(9 3),

y

O Qv

1

(1 3),

(3 7),

y

O 3 x

(2 8),

(6 2),

O x

(1 4),

(3 6),

Bv xy

O 2 x

(3 5),

(6 10),

~`y

O Qv

(2 4),

(5 1),

O x 2

(7 5),

(5 1),

Bv y

O (x + 2) 2

(4 7),

3

yx~`

O x

(2 9),

(8 6),

4037 Cambridge

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Y:\HAESE\CAM4037\CamAdd_07\189CamAdd_07.cdr Tuesday, 21 January 2014 12:10:31 PM BRIAN