Question

You improve your time running a course by 5 seconds in week one, by 3 seconds in week two, and by 4 seconds in week three. What is the average weekly change in your runny time

Answer 1

`m_a- the \ aritmethic \ average \\ \\ m_a= (5+3+4)/(3)= (12)/(3) \\\\ \boxed{m_a=4s}`