Question

I wills end you a picture

Answer 1

The rate of change is represented by the slope of each club.

For Club A is 12.

For Club B we calculate using the formula

`m=(y2-y1)/(x2-x1)`
`\begin{gathered} m=(42-21)/(2-1) \\ m=(21)/(1)=21 \end{gathered}`

The value is 21.

For Club C we apply the same formula and use the poins shown in the graphic

`\begin{gathered} m=(70-40)/(3-1) \\ m=(30)/(2) \\ m=15 \end{gathered}`

For club D the slope is the value that is paid each month

which in this case is $20

According to this the greatest rate of chande is for Health Club B