Question

If y varies directly as x, and y = 15 as x = -3, find y for the x-value of 4.

Answer 1

direct variation is y = kx where k is a constant
so plug in y=15 and x=-3 in this formula an solve for k

then rep ace k by the value you just found to get the formula relating y and x
then replace x by 4 and calculate the value of y.

Answer 2

ill start the first part off for you
y = kx so
15 = -3* k
k = 15 /-3

can you continue?

Answer 3

-5?