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Straight Line Graphs

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Question 127

In 1960 the life expectancy in the UK was 70 years The life expectancy, x x\,x years, n n\,n years after 1960, is modelled by

x=15n+70 x = \frac{1}{5}n + 70 x=51​n+70
a.

Find the life expectancy in the UK in 1975.

[3]
b.

In 2020 the life expectancy in the UK was 83.5 years. Comment on the suitability of this model in light of this information

[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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