Question 621034
If you transpose the equation {{{4x-4y=-9}}} you get {{{y=x+(9/4)}}}. A perpendicular line to this must have a slope of -x. To derive the required y-intercept for an equation that meets the conditions you must also transpose the equation {{{-7x+2y=-3}}} such that it becomes {{{y=(7/2)x-(3/2)}}}. Thus, the answer must be {{{y=-x-(3/2)}}}.