7: Parallel lines have the same slope y = -3x + b Plug in the x and y values from the point 5 = -3(-4) + b 5 = 12 + b -7 = b Answer to 7: y = -3x -7
8: Perpendicular lines have opposite reciprocal slopes y = -2x + b Plug in x and y from the point -6 = -2(7) + b -6 = -14 + b 8 = b Answer to 8: y = -2x + 8
