The graph shows the distance, y in miles, of a moving train froma station for a certain period of time, x, in hours:
Distanco vs. Time
$5
30C
256
from Station 20
Distance
(in mi )
10
2 nr)
5
Time
What is the speed (in miles per hour) of the train?

The speed can be found from a graph of distance versus time by looking at the slope of the graph. Here, the graph is a straight line, so the slope is constant. This means the speed is constant.

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It can be convenient to determine the speed by looking at distance for times that are 1 time unit apart. Here, that could be the distances at t=0 and at t=1. We see in that hour, the train traveled from 100 miles to 150 miles away from the station. Its speed was 150 -100 = 50 miles per hour.

The graph shows the distance, y in miles, of a moving train froma station for a certain period of time, x, in hours: Distanco vs. Time $5 30C 256 from Station 20 Distance (in mi ) 10 2 nr) 5 Time What is the speed (in miles per hour) of the train?

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The graph shows the distance, y in miles, of a moving train froma station for a certain period of time, x, in hours:
Distanco vs. Time
$5
30C
256
from Station 20
Distance
(in mi )
10
2 nr)
5
Time
What is the speed (in miles per hour) of the train?