Question

Show that (-3, 2) (1, -2) and (9, -10) are collinear? ​

Answer 1

See below

Explanation:

See attached

Given points:

• (-3, 2), (1, -2) and (9, -10)

Method 1

• Plot points on a graph and connect them, if they make a straight line, then they are collinear

Method 2

• Chose 2 pairs of points and find a slope, if slopes are equal then they are collinear
• m1 = (-2 - 2)/(1+3) = -1
• m2 = (-10 +2)/(9 - 1) = -1