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The time, in hours, that it takes Alistair to jog 5 km is inversely proportional to...

The time, in hours, that it takes Alistair to jog 5 km is inversely proportional to his average speed, in kilometres per hour. a) Write a function to represent the time as a function of the speed. b) Sketch a graph of this function. c) If Alistair jogs at 4.5 km/h, how long does it take him to complete a 5 km run, to the nearest minute? d) Describe the rate of change in Alistair's run times as his average speed increases.

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