Quick questions on Modelling with formulae and graphs - SQA Higher Applications of Maths

3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is q1?

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A plumber charges a

\pounds 40

call-out fee plus

\pounds 35

per hour. Write a formula for the cost

C

of a job lasting

h

hours and find the cost of a

3

hour job. [2 marks]

What is q2?

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A sample of

80

mg of a substance decays by

15\%

each day. Write a formula for the mass

m

after

d

days and find the mass after

5

days. [3 marks]

What is q3?

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A car park charges

\pounds 2

for up to

2

hours, then

\pounds 1.50

per extra hour. Write the cost for a stay of

t

hours when

t > 2

. [2 marks]

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