Interpreting Distance-Time Graphs!

Every morning Mark walks along a straight road from his home to a bus stop, a distance of 160 meters. The graph below shows his journey on one particular day.

Mark walks straight on the street heading to the bus stop. Use the information in the graph to create a story on what might had happened during his journey. Locate at what time did he go back a certain distance towards home and find out at what time did he reached the bus stop.

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The graph shows Mark's journey is split into four sections. The straight lines indicate that Mark moves at a constant but different speed in each section.

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There were 4 sections in the graph, can you determine the rate of change in each section? (Hint: Use two set of points in each section to determine the slope of a line)

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To find the slope of a line, find the quotient of the difference of the y-values and the difference of the x-values of the two selected points.

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