Reporting Category: Physical Sciences Standard: 12 - Graph and interpret distance vs. time graphs for constant speed.

A student takes part in a 400 m race. The table below shows the distance the student traveled over time.

Time (s)

Distance (m)

0

0

30

100

60

200

90

300

120

400

150

400

180

400

On the grid in your Student Answer Booklet, copy the x-axis and y-axis labels as shown below and use the information from the table to make a proper scale by adding numbers to each axis on your graph.

Draw a line on your graph to represent the motion of the student from 0 s to 120 s.

Calculate the average speed of the student from 0 s to 120 s. Be sure to show your calculations and include units in your answer.

Is the student moving from 120 s to 180 s? Explain your answer.

Scoring Guide and Sample Student Work Select a score point in the table below to view the sample student response.

The response demonstrates a thorough understanding of how to graph and interpret distance versus time graphs for constant speed. The response includes a correctly drawn graph and correctly calculates the average speed of the student. The response correctly identifies whether the student is moving during the time shown on the graph and clearly explains the answer.