Question

The amount of money Sarah has saved (S) can be modeled by the function equation:

S(w) = 8w + 20, where 'w' represents the number of weeks since she started saving. What does the rate of change mean for this situation?


A. Sarah has saved a total of $8


B. Sarah started with a savings of $8


C. Sarah saves $8 per week


D. Sarah saves $20 a week

Answer 1

The correct answer is C.

Sarah saves $8 per week.

The rate of change in this situation describes how much money Sarah saves each week, which is $8.

The solution to this equation is that Sarah saves $8 per week. This can be found by substituting "w" with the number of weeks since she started saving and solving for S.