On a map, elm wood drive passes through r(4,-11) and s(0,-9) and taylor road passes through j(6,-2) and k(4,-5). if they are straight lines are the two streets perpendicular?

Δabc is dilated by a scale factor of 3 with the origin as the center of dilation to form δa′b′c′. the slope of is -1.2. the length of is p units, the length of is q units, and the length of is r units. the slope of is . the length of is units.