Solve the problem.A plumber charges a fixed rate plus an hourly rate to do house calls. The ordered pair (2, 65) indicates total charges of $65 for a job taking 
and the ordered pair 
indicates total charges of $170 for a job taking 9 hours.a) Write a linear equation giving the total charges, y, in terms of the number of hours x.b) Use the equation found in part a to find how much it costs for 4 hours.c) How many hours would result in a total charge of $125?
A. y = 15x + 35; $95; 6 hours
B. y = 15x; $60; 6 hours
C. y = 15x + 35; $95; 8 hours
D. y = 15x + 35; $60; 6 hours
Answer: A
Mathematics
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