Consider the 4 points A(1,5), B(-4,6), C(0,0), D(-12,12). Find the gradients of the lines:
(b) CD;
(c) BD.
I will do one, you do the other
slope CD = (12-0)/(-12-0)
= 12/-12 = -1
(b) CD;
(c) BD.
slope CD = (12-0)/(-12-0)
= 12/-12 = -1