Question

You are able to walk uphill at a speed of 2 miles per hour and downhill at a speed of 3 miles per hour. What does the graph represent?

Answer 1

The slope from 0 to 3 hours is 2 miles per hour. The slope from 3 to 4 is 3 miles per hours.

So we conclude you went uphill for three hours and downhill for 1. You have another hour to go before your back where you started.

Answer 2

The slope is 6/3 = 2 for time ≤ 3, so we presume this represents an uphill walk of 3 hours. The slope increases after that, suggesting a downhill walk. The lower-left selection is indicated.