Question

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Study the graph shown. It is a graphic of a car trip taken by Karen and her mother. The starting position (0,0) is their home.

Calculate the average speed of the car during the first hour of the trip: 1 miles/hour, 5 miles/hour, 40 miles/hour or 25 miles/hour?

Answer 1

The speed during the first hour is the slope of the piece of line that shows the first hour on the graph.

Average speed is always=(distance covered)/(time to cover the distance)

Distance covered during the first hour = from 0 miles to 40 miles on the graph; that's 40 miles.

Time to cover the distance = from 0 hours to 1 hour on the graph; that's 1 hour

Average speed = (40 miles) / (1 hour)

Average speed during the first hour = 40 miles/hour

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