Question

Suppose y varies directly as x, and y = 14 when x = -4 . What is the value of y when x = -6

Answer 1

y = 21

Explanation:

direct variation

y= kx

14 = k(-4)

solve for k

-14/4 = k

-7/2 =k

y = -7/2 x

now substitute in x= -6

y = -7/2 * -6

y = 7/2 *6

y = 21