MATHEMATICS · Multi-part · A Level · Mathematics · Coordinate geometry in the (x y) plane · Coordinate geometry in the (x y) plane
Problem
Given the points P(−2,3), Q(1,−1) and R(4,−5), answer the following:
(i) Calculate the slope of PQ.
(ii) Calculate the slope of QR.
(iii) Are the three points collinear? Justify your answer based on the values obtained.