Thread: Direct Variation!

Use the given values to write an equation that relates x and y.

x=-9, y=3
Find y when x=12

Originally Posted by SpaceGhost

Use the given values to write an equation that relates x and y.

x=-9, y=3
Find y when x=12

Direct variation therefore y = kx. Substitute x = -9 and y = 3 to solve for k. Substitute the value of k and then use the formula to find y when x = 12.