The table below shows the hourly rates for a personal trainer at a health club. Write an equation that describes the cost of x hours of training, and then determine the cost of 5 hours:
Hours (x)
Cost (C)
1
$55
2
$100
3
$130
X
?
?
A. ?? = 55x, C(5) = 275
B. ?C = x + 55, C(5) = 60
C. ?C = 55(3), C(5) = 165
D. ??C = 55x +55, C(5) = 330
E. ?C = 55x, C(5) = 255
Answer: A
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