**Key Points**

**1. **The steeper the line on a distance-time graph, the greater the speed it represents

**2.** Speed (metre/second, m/s) = distance travelled (metre, m)

time taken (seconds, s)

- We can use graphs to help us describe the motion of a body.

- A distance time graph shows the distance of a body from a starting point (y-axis) against time taken

(x-axis).

- The slope of the line on a distance-time graph represents speed.

- The steeper the slope, the greater the speed.

- The speed of a body is the distance travelled each second.

- We can calculate the speed of a body using this equation: speed = distance

time

- The SI unit of speed is metres per second (m/s)

**Check Yourself**

**1.** What does the slope of the line on a distance-time graph represent?

**2.** What is the equation that relates speed, distance and time?

**3.** What is the SI unit of speed?

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