Understanding Engineering Mathematics

Answers to reinforcement exercises

7.3.1 Coordinate systems in a plane

A.

y

− 4 − 3 − 2 − 10 1 2 3 4 x

3

4

(−2,3)

(−1,−1)

(0,−2)

2 (3,2)

1

− 1

− 2

− 3

− 4

(0,4)

(3,−1)

(1,1)

(4,0)

B.

123

(i)

(vii)

(iv)

(viii)

(vi)

(iii)

(v)

(ii)

p 2 p

0

p

2

p

6

p

3

2 p

3

5 p

6

4 p

3

3 p

2

5 p

3

11 p

6

7 p

6