Question

Suppose y varies directly with x when x is 4, y is 32. What is y when x is -2

Answer 1

Explanation:

Since y varies directly with x,

y = kx, where k is a real constant.

When x = 4, y = 32.

=> (32) = (4)k, k = 8.

Therefore when x = -2,

y = kx = (8)(-2) = -16.