Suppose y varies directly with x. Write a direct variation equation that relates x and y. Then find the value of y when x=7. 1. y=8 when x=−4.
2. y=3 when x=9.

Atriangle has an area of 72 square inches. if the base of the triangle has a length of 18 inches, what is the height of the triangle? use the formula for the area of a triangle: area = (base)(height) type a numerical answer in the space provided. do not include the units or spaces in your answer.