Question

The function D(h)=25h+50 models the distance a train traveled from a station, in miles, h hours after crossing a bridge, what is the meaning of the x intercept?

Answer 1

the x intercept is where the line crosses the y axis or where D(h)=0
D(h) is the distance that the train is from the station

so that means that when D(h)=0, that is when the train is at the station

Answer 2

The train crossed the bridge 2h after leaving the station.