A line has gradient $3$ . What is the gradient of a line perpendicular to it?

Practise more Coordinate geometry.

Free questions with an explanation for every one, and full timed Singapore GCE O-Level mock tests.

Find the midpoint of the line segment joining $A (1, 2)$ and $B (5, 8)$ .
Find the midpoint of the line segment joining $A (- 2, 3)$ and $B (4, - 1)$ .
Find the midpoint of the line segment joining $A (0, - 3)$ and $B (6, 5)$ .
Find the midpoint of the line segment joining $A (2, 2)$ and $B (8, 10)$ .
Find the midpoint of the line segment joining $A (- 4, - 1)$ and $B (2, 7)$ .
Find the midpoint of the line segment joining $A (3, 0)$ and $B (9, 8)$ .