AlgebraEasy–MediumInterpreting the slope of a cost model
Algebra practice question
The cost C, in dollars, of a phone plan for m months is C = 25m + 40. What does the number 25 represent?
- A. The cost added for each month of the planCorrect
- B. The one-time starting charge
- C. The total cost for one month
- D. The number of months in the plan
Answer: A. The cost added for each month of the plan
25 multiplies the number of months.
Why the other answers are wrong
- B. The one-time starting charge
- 40 is the one-time charge.
- C. The total cost for one month
- One month costs 65.
- D. The number of months in the plan
- m is the number of months.
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