Question

Suppose y varies directly with x, and y = -10 when x = 2 . What is the value of y when x = 12

A. 12
B. -24
C. -120
D. -60

Answer 1

Explanation:

y varies directly with x then, y=kx

for x = 2 and y= -10 we get:

-10 = 2k

k= -5

when x = 12

y = -5 * (12) = -60

D