Solve for x, set y to 0 2x - 4(0) = 9 2x = 9 x = 4.5 Solve for y, set x to 0. 2(0) - 4y = 9 -4y = 9 y = -2.25

if they are talking about intercepts then x=(9/2,0) and y=(0,-9/4)