Coordinate Geometry Question

Question

The line AG passes through the points (−4,6) and G (8,3).

The line BC passes through the points (−1,2) and (0,8).

The line EF passes through the points (−2,1) and (−1,5).

Which two lines are perpendicular to each other?

A) None of these

B) Line AG and Line BC

C) Line BC and Line EF

D) Line AG and Line EF

Answer 1

Calculate the three slopes. Two lines are perpendicular if their slope are negative reciprocals. If one line is vertical, the other is horizontal. There is a solution here.