Question Video: Reading Values from a Distance-Time Graph | Nagwa Question Video: Reading Values from a Distance-Time Graph | Nagwa

Question Video: Reading Values from a Distance-Time Graph Science • Third Year of Preparatory School

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A toy car is made to travel different distances, and the time taken to travel each distance is recorded. The results are shown in the table and also on the graph. Which reading from the table records the measurements of distance and time that are shown by the pink marker on the graph?

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Video Transcript

A toy car is made to travel different distances, and the time taken to travel each distance is recorded. The results are shown in the table and also on the graph. Which reading from the table records the measurements of distance and time that are shown by the pink marker on the graph?

In this question, we’ve been asked to match the pink marker on the distance–time graph with the correct reading from the table. A distance–time graph is made up of a vertical axis representing distance and a horizontal axis representing time. By studying the graph, we can see that the total distance on the vertical axis is 50 meters.

Notice that there are five grid lines on this axis. So each line must represent one-fifth of the total distance moved. Therefore, each of these grid lines marks a distance of 10 meters. The horizontal axis tells us that the total time taken for the toy car to travel is 20 seconds. And again, there are five grid lines on this axis. So each grid line must represent one-fifth of the total time taken. That means that each grid line marks a time of four seconds.

Now, let’s take a look at the pink marker to find its corresponding distance and time measurements. We can see that along the vertical axis, the pink marker is on the third grid line, which corresponds to a distance moved of 30 meters. We can also see that along the horizontal axis, the pink marker is on the third grid line, which corresponds to a time taken of 12 seconds.

Now that we’ve worked out the distance and time represented by the pink marker, we just need to identify which reading in the table, whether it’s the first, second, third, and so on, records these measurements. For the correct reading, the value in the “distance moved” column is 30, and the value in the “time taken” column is 12. Looking at the table, we can see that the fifth reading matches, with a distance moved of 30 meters and a time taken of 12 seconds. Therefore, the fifth reading on the table records the measurements shown by the pink marker on the distance–time graph.

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