Question

The value of y varies directly with x, and y=-2 when x=5. Find y when x=15.

A. -6

B. 6

C. 37.5

D. -37.5

Answer 1

A -6

Explanation:

Since y varies directly with x, then y = kx

-2 = 5k

k = -2/5

Now, y = (-2/5)15 = -6