Question

At the end of each month, Eva received a statement showing the balance of her savings account.
Eva's savings account balance
Month Amount
March $61
April $55
May $99
June $63
July $62
According to the table, what was the rate of change between March and May?
$
permonth

Answer 1

To calculate the rate of change between March and May, we first need to find the difference in the account balance between these two months and then divide that by the number of months between them.

1. **Balance in March:** $61
2. **Balance in May:** $99
3. **Change in balance:**
\[
99 - 61 = 38
\]
4. **Number of months between March and May:**
- March to April: 1 month
- April to May: 1 month
- Total: 2 months

5. **Rate of change:**
\[
\text{Rate of change} = \frac{\text{Change in balance}}{\text{Number of months}} = \frac{38}{2} = 19
\]

So, the rate of change between March and May is **$19 per month**.