The customer service department for a large electronics store receives a significant number of phone calls each day. On an average business day, the department receives 162 calls in the first three hours they are open. After nine hours, they have received an average of 486 calls.
Assuming the calls come in at a constant rate, which of the following applies?

A. An additional hour is associated with an additional 72 phone calls.

B. An additional hour is associated with an additional 54 phone calls.

C. An additional hour is associated with an additional 108 phone

Question

The customer service department for a large electronics store receives a significant number of phone calls each day. On an average business day, the department receives 162 calls in the first three hours they are open. After nine hours, they have received an average of 486 calls. 
Assuming the calls come in at a constant rate, which of the following applies?  

  A.    An additional hour is associated with an additional 72 phone calls.

  B.    An additional hour is associated with an additional 54 phone calls.

  C.    An additional hour is associated with an additional 108 phone

whpalmer4 · Answer

if you get 162 calls in 3 hours, how many is that per hour?

whpalmer4 · Answer

or for the same answer, if you get 486 calls in 9 hours, how many is that per hour?

anonymous · Answer

54

whpalmer4 · Answer

yep.  so how many calls would you expect to receive in an additional hour?

anonymous · Answer

D.    An additional hour is associated with an additional 36 phone calls.

whpalmer4 · Answer

that's the answer you're choosing? :-(

whpalmer4 · Answer

you don't like B. An additional hour is associated with an additional 54 phone calls?

anonymous · Answer

yes I do this just was an answer that I didn't put on here

whpalmer4 · Answer

okay.  well, I don't care about answer choices that don't have the correct answer :-)