Question

1. If y varies directly with x and y=24 when x=6

find y when x=9

and find x when y=40

Answer 1

y = 36 and x = 10

Explanation:

y/x = 24/6 = 4. Thus y = 4x and x =y/4

For x = 6, y = 9 × 4 = 36.

For y = 40, x = 40/4 = 10.