Suppose y varies directly with x, and y=8 when x=-6. What direct variation equation relates x and y? What is the value of y when x=-2? A.y=-0.75x;1.50 B.y=-1.33x;2.67 C.y=1.33x;-2.67 D.y=0.13x;-0.25

Question

anonymous · Answer

Direct variation --> y = kx where k is some #

Now that you have the "formula" you plug in the given x & y and then solve for k.

8 = -6k

k = -4/3

Now you take k and plug it into the original equation and leave your answer in terms of k & y

$$y = (-4/3)x$$

Now you can plug in different values for x and get resultant y-values.