Speed-time graphs show speed on the vertical axis and time on the horizontal axis. The gradient of a speed-time graph represents acceleration because: gradient = \( \frac {\text{change in y}}{\ ...

40 ÷ 2 = 20 The speed of the return journey is 20 km/h. Practise reading and plotting distance-time graphs with this quiz. You may need a pen and paper to help you with your answers. Professional ...