Question

Michael started a savings account with $300. After 5 weeks, he had $350 dollars, and after 10 weeks, he had $400. What is the rate of change of money in his savings account per week?

Any help would be appreciated ♥​

Answer 1

10 dollars a week is the answer

Answer 2

You can choose any 2 known points to find the rate of change. I’ll use the 5-week and 10-week ones. Rate of change of money per week:

Change in money / change in week
= (400 - 350) / (10 - 5)
= 50 / 5
= 10

The rate of change is $10/week.