Question

If y varies directly with an x and y=12 when x=-1, find y if x=2

Answer 1

y = -24

Explanation:

Direct variation is

y = kx where k is a constant

12 = k*(-1)

12/(-1) =k

-12 = k

The equation is y = -12x

Let x = 2

y = -12(2)

y = -24