Jeb has to pay a plumber $65 to come to his house and $40 per hour after that. What is the equation for the cost #(y)# based on the number of hours #(x)#?

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Answer 1 · 2017-09-22T11:12:15

#y = 40x + 65#

The equation needs to be of the form #y = mx + b#

Where #m# is the hourly rate .i.e.$40.00

#b# is the call out rate .i.e $65.00

#x# is the number of hours.

#y# is the total amount payable.

So we would have:

#y = 40x + 65#

Example: plumber spending four hours to complete a job would be:

#y = 40(4) + 65 = $225.00#