The number of hours spent practising and the ability to successfully execute a specific skill (e.g. arm stand, high board dive) are related by a straight-line model:  the more you practise, the better the performance of the dive. Which of the following equations best represents a ‘straight line’ model?

A. y = mx + c
B. y = mc + x
C. y = cm – x
D. y = cx + m


Answer: A

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