Let X = (3, 5), Y = (7, -11), Z = (-13, -17).
Write a point slope form equation for each of the lines XY, YZ, ZX.
Find a1 and b1 such that points P1 = (a1, 2) and P2 = (-3, b1).
Find a2 and b2 such that points Q1 = (a2, 2) and Q2 = (-3, b2).
Find a3 and b3 such that points R1 = (a3, 2) and R2 = (-3, b3).
