AlgebraEasyReading a rate from a function
Algebra practice question
The function c(m) = 0.2m gives the cost, in dollars, of sending m text messages. What is the cost of one message?
- A. $0.20Correct
- B. $2.00
- C. $0.02
- D. $1.00
Answer: A. $0.20
c(1) = 0.2 × 1 = 0.2 dollars.
Why the other answers are wrong
- B. $2.00
- $2.00 would be 2m.
- C. $0.02
- $0.02 misplaces the decimal.
- D. $1.00
- $1.00 would be c(5).
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