Chapter 5 - Linear Functions - 5-2 Direct Variation - Practice and Problem-Solving Exercises - Page 306: 45

y=-6

Since we know that in a direct variation the ratio of yx is constant, lets divide the two y-coordinates with their respective x-coordinates and set them equal to each other: y/1=−9/(3/2). (Cross Multiply) 3y/2=-9 (Multiply both sides by 2) 3y=-18 (Divide both sides by 3) y=-6