Triangle abc and triangle cde are similar right triangles. which proportion can be used to show that the slope of ac is equal to the slope of ce?
a) 1 − (−1) −1 − 4 = 5 − (−1) 5 − 1
b) 1 − (−1) −1 − (−4) = 5 − 1 5 − (−1)
c) −1 − (−4) 1 − (−1) = 5 − 1 5 − (−1)
d) 1 − (−1) −1 − (−4) = 5 − (−1) 5 − 1