Financial Maths, SMB-002

Bella is an electrician.

She charges $150 to attend a job and then a fixed price for each minute she spends on the job.

The graph below shows Bella's charge based on the number of minutes she spends at the job.

How much will Bella charge for a job that takes 60 minutes? (2 marks)

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`$330`

Show Worked Solution

`text(Charge to attend = $150)`

`text(From the graph,)`

`=>\ text(50 minute job costs $300)`

`:.\ text(C)text(ost per minute)`

`= (300-150)/50 = $3`

`:.\ text(C)text(ost of 60 minute job)`

`= 150 + 60 xx 3`

`= $330`