AlgebraEasy–MediumOutput of a linear model
Algebra practice question
A phone plan costs $30 per month plus $0.25 per gigabyte of data used. What is the cost, in dollars, of a month in which 200 gigabytes are used?
Answer: 80
30 + 0.25 × 200 = 30 + 50 = 80.
Common wrong answers
- If you answered 50
- 50 is the data charge alone.
- If you answered 230
- 230 adds 200 to 30, treating each gigabyte as $1.
- If you answered 6050
- 6,050 multiplies (30 + 0.25) by 200.
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