Question

Suppose y varies directly as x. if y=-7 when x=-14, find x when y=10

Answer 1

20

Explanation:

From if y=-7 when x=-14 ----> x=2y

that means when y=10, x=20

Answer 2

Answer: X = 20

Explanation:

Y = KX (where K is the proportionality constant as y varies directly with X)

-7 = -14 K

K = -7/-14

K = 0.5

Hence finding X when Y is 10

Y = 0.5 X

10 = 0.5X

X = 10/0.5

X= 20