There are two important types of graph that we need to be familiar with, which are speed-time and distance-time graphs. In each of these, time is measured along the x-axis.

They can give us lots of useful information, particularly if we remember that the **gradient of a distance time graph tells us the speed travelled**, the **gradient of a speed time graph tells us the acceleration **and the **area under a speed time graph tells us distance travelled.** We must, of course, be careful with the units of measurement.

Let’s look at some to get the idea of the kind of information we can get from them:

**Exercise**

Let’s complete exercise 11C on pages 167 to 169 of the textbook:

Below are the answers: