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7 The points P(–1, 3), Q(4, 5) and R(9, k) all lie on a straight line.
(a) Find the value of k.
[3]
(b) Find the equation of the line.
[3]
(c) Show that point Q is the midpoint of line PR.
[2]
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y
P(–6, 3)
x
Q(0, –5)
(a) Find the equation of line PQ.
[3]
(b) Find the length of line PQ.
[3]
Chapter 3 Coordinate Geometry 65
Chapter 3.indd 65 15/03/2022 10:28 AM
