A train travels at a steady rate of 80 mph. If the train travels for one-half hour nonstop, what are the domain and range of the distance function during the trip?

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Soto

Mathematics

13 December, 10:27

A train travels at a steady rate of 80 mph. If the train travels for one-half hour nonstop, what are the domain and range of the distance function during the trip?

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Darnell Mays · Answer 1

The independent variable is time, which varies from 0 to 0.5, so domain = [0,0.5].

The distance travelled is the dependent variable, varying from 0 to (1/2) 80=40 km. The range is therefore [0,40].

Note: in interval notation, a square bracket means that the value is included in the interval.