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Straight Line Graphs

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Question 32

The line l1 l_1\,l1​ has equation 2y+20x+11=02y + 20x + 11 = 02y+20x+11=0 The line l2 l_2\,l2​ has equation y=mx+45y = mx + 45y=mx+45, where m m\,m is a constant. Given that l1 l_1\,l1​ and l2 l_2\,l2​ are perpendicular.

a.

Find the value of mmm.

[2]
b.

Find the coordinates of the point where l1 l_1\,l1​ and l2 l_2\,l2​ meet.

[3]
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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