SAT OwlQuestion bank / Linear functions
The total cost , in dollars, of a phone plan after months is given by . Which statement is the best interpretation of ?
A
The plan costs per month for 6 months.
B
The monthly cost increases by each month.
C
After paying , the customer has 6 months remaining.
D
The total cost of the plan for 6 months is .
Show answer and explanation
Answer: D
The input is a number of months and the output is the total cost in dollars. So the total cost for 6 months is .
Choice A misreads the output as a monthly cost rather than a total cost.
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