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1 Unit 1: Pure Mathematics A

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Question 362

A plumber charges a fixed call-out fee plus a fixed hourly rate for the time spent on a job.

A job lasting 2 hours costs £115.

A job lasting 5 hours costs £250.

The plumber's charge, £CCC, for a job lasting t t\,t hours is modelled by a straight line.

a.

Find an equation for C C\,C in terms of ttt.

[3]
b.

Interpret the gradient and the vertical intercept of your model in the context of the question.

[2]
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1 Unit 1: Pure Mathematics A Questions

  1. A Level
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  3. /1 Unit 1: Pure Mathematics A

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