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Math·Advanced Math·Nonlinear functions

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The estimated fuel cost $C(x)$, in dollars, to drive a vehicle 100 kilometers is given by the function $C(x)=0.0019x^2-0.248x+12.62$, where $x$ is the average speed, in kilometers per hour, of the vehicle. If the function $C$ is graphed in the xy-plane, where $y=C(x)$, what is the best interpretation of the point $(60,4.58)$ on the graph?

A

The estimated fuel cost to drive the vehicle at an average speed of 4.58 kilometers per hour increases by $60 each hour.

B

The estimated fuel cost to drive the vehicle at an average speed of 60 kilometers per hour increases by $4.58 each hour.

C

The estimated fuel cost to drive the vehicle 100 kilometers at an average speed of 4.58 kilometers per hour is $60.

D

The estimated fuel cost to drive the vehicle 100 kilometers at an average speed of 60 kilometers per hour is $4.58.