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Answer: BSet 1: Linear Functions (Advanced)
Explanation
PROBLEM
A taxi charges $3 plus $2 per mile. Write f(m) for cost of m miles.
A taxi charges $3 plus $2 per mile. Write f(m) for cost of m miles.
A.
f(m) = 2m - 3
B.✓ Correct
f(m) = 2m + 3
C.
f(m) = 3m + 2
D.
f(m) = 5m
Detailed Explanation
Choice B is the best answer. Cost = 3 + 2m = 2m + 3
Why others are wrong:
A: f(m) = 2m - 3 is incorrect because it does not satisfy the equation.
C: f(m) = 3m + 2 is incorrect because it does not satisfy the equation.
D: f(m) = 5m is incorrect because it does not satisfy the equation.