Posted by **Jane** on Thursday, June 7, 2012 at 4:30pm.

4. Gregory teaches martial arts. He charges a one-time processing fee of $5.00 and the

cost of the classes is shown below. Let x represent the number of classes and y represent the cost

of classes. Based on this information, what will it cost to take 10 classes?

Cost of classes (not including processing fee)

Number of Classes, x

1

2

3

4

Cost of Classes, y

$15.00

$27.00

$39.00

$51.00

A. $123.00

B. $125.00

C. $128.00

D. $130.00

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