Determine which of the following four functions might be used as a model for the data: linear: 
quadratic: 
quadratic: 
polynomial, not quadratic or linear. Unidentified Flying Object
Linear distance in miles
A. f(x) = mx + b
B. f(x) = ax2 + bx + c, a < 0
C. f(x) = ax2 + bx + c, a > 0
D. Polynomial, not quadratic or linear
Answer: A
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