Question

2. Sara started out with $50 in her piggy bank. Every week she deposited the same amount of

money in the bank. After 7 weeks she had $67.50. Find the average rate of change or slope
in dollars per week. (This is a unit rate.)

Answer 1

Answer: 2.5 dollars/week

Explanation:

50 + 7x = 67.50 x is the cost she deposited every week

7x = 17.5

x = 2.5