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Math·Algebra·Linear functions

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$f(x)=60x+8$

The given function $f$ estimates the distance a train has traveled, in kilometers, from a station in a certain city $x$ hours after crossing the city border. What is the best interpretation of $8$ in this context?

A

Between the station and the city border, the train traveled an estimated total distance of $8$ kilometers.

B

After crossing the city border, the train traveled at an estimated speed of $8$ kilometers per hour.

C

After crossing the city border, the train traveled an estimated total distance of $8$ kilometers.

D

Between the station and the city border, the train traveled at an estimated speed of $8$ kilometers per hour.