Question

The total cost of a service call for x hours of labor at company A is modeled by a line of best fit with the equation y = 28x + 32.5.

The initial charge for a service call at company B is $3 less than at company A but their hourly rate is 25% greater.
What is the expected total cost of a service call for 6 hours of labor at company B ?

Answer 1

$239.50

Explanation:

Company A

y = 28x + 32.5

Company B

The initial charge for a service call at company B is $3 less than at company A but their hourly rate is 25% greater

25% of 28 is 7

28 + 7 = 35

32.5 - 3 = 29.5

y = 35x + 29.5

What is the expected total cost of a service call for 6 hours of labor at company B ?

y = 35(6) + 29.5

y= 210 + 29.5

y = $239.50