The three statements that describe this function are the rate of change is $0.75, the initial fee is $2, and a twenty-mile trip is $17.
What is a function?
A function shows the mathematical relation between two factors. In this case, the factors are miles and cost.
What is true about this function:
- The rate of change is $0.75: The difference in the cost between one mile and the next one is always $0.75. For example, a 4-mile trip is $5 and a 3-mile trip is $4.25 (5-4.25= 0.75).
- The initial fee is $2: When the value of the miles is 0 the cost is $2, which shows this is the initial basic fee.
- A twenty-mile trip is $17: The function follows the pattern 2 + x (0.75); this means 2 + (20 x 0.75) = 2 + 15 = $17.
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