## Exam-Style Questions.## Problems adapted from questions set for previous Mathematics exams. |

## 1. | GCSE Higher |

The following diagram shows a distance-time graph of the movement of a fish.

(a) Work out the average speed between 10 and 20 seconds.

(b) Estimate the speed of the fish at 25 seconds.

## 2. | GCSE Higher |

The graph shows the temperature (\(T\)) of an unidentified flying object over a period of 10 seconds (\(t\)).

Use the graph to work out an estimate of the rate of decrease of temperature at 7 seconds. You must show your working.

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