Question

If y=1/4 when x=5, find y when x=7, given that y directly with x

Answer 1

7/20

Explanation:

Since y varies directly with x, the ratio of y to x is proportional.

... y / 7 = (1/4)/(5)

... y / 7 = 1 / 20 . . . . simplify

... y = 7/20 . . . . . multiply by 7