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Maths Portfolio Type II- Stopping Distances The table below shows the average stopping and thinking distances when a person is driving a car and needs to apply the brakes at various speeds. Speed (kmh-1) Thinking Distance (m) Braking Distance (m) 32 6 6 48 9 14 64 12 24 80 15 39 96 18 55 112 21 75 From this data we can graph two data plots: one showing the relationship between speed versus and the other between speed versus braking distance. Figure 1 Figure 2 Figure 1 shows a straight line, and therefore it can be said that it is a linear graph. It shows that the correlation between speed and thinking distance is directly proportional and shows the trend that as the speed increases the thinking distance also increases. The equation of this graph is in the form, where m is the gradient, and c is the y intercept. The equation can be worked by following these steps: * Find m (the gradient) using the following equation: * b is the y intercept...

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