To repair a refrigerator, a technician charges $ 60 per hour for labor plus $ 120 for parts. Which function

Question

To repair a refrigerator, a technician charges $ 60 per hour for labor plus $ 120 for parts. Which function f represents the total amount, in dollars, the technician will charge for this job if it takes x hours?

Accepted Answer

Choice C is correct. It&rsquo;s given that the technician charges $ 60 per hour for labor. Therefore, if the job takes x hours, the technician will charge $ 60 1 &#160;hour x &#160; hours , or $ 60 x , for labor. It&rsquo;s also given that the technician charges $ 120 for parts. Therefore, f x = 60 x + 120 represents the total amount, in dollars, the technician will charge for this job if it takes x hours. Choice A is incorrect and may result from conceptual or calculation errors. Choice B is incorrect. This function represents the total amount, in dollars, the technician charges for labor only, not the total amount charged for labor and parts. Choice D is incorrect. This function represents the total amount, in dollars, the technician would charge if the charge for parts were subtracted from, rather than added to, the charge for labor.

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