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Straight Line Graphs

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Question 42

The points A A\,A and B B\,B have coordinates (−2,k+1)(-2, k + 1)(−2,k+1) and (2k+4,10)(2k + 4, 10)(2k+4,10) where k k\,k is a constant. Given the gradient of AB AB\,AB is 12\displaystyle \frac{1}{2}21​

a.

Show that k=3k = 3k=3

[2]
b.

Find the equation of the line that passes through A A\,A and BBB.

[3]
c.

Find the equation of the perpendicular bisector of ABABAB. Give your answer in the form ax+by+c=0ax + by + c = 0ax+by+c=0

[4]
Markscheme

Straight Line Graphs Questions

  1. A Level
  2. /Maths
  3. /Straight Line Graphs

260 exam-style questions on Edexcel A Level Maths Straight Line Graphs, covering 5.1 y = mx + c, 5.2 Equations of Straight Lines, 5.3 Parallel and Perpendicular Lines, 5.4 Length and Area, and 5.5 Modelling with Straight Lines. Each one has a worked solution and a mark scheme showing where the marks go.

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