What is slope of (-4,7) (-6,-4)
slope = m = [ y2 - y1 ] / [ x2 - x1 ]
(x1, y1) = (-4, 7) and (x2, y2) = (-6, -4)
Substitute: m = [ -4 - 7 ] / [ -6 - -4 ] = -11/-2 = 11/2