To find the constant rate of change, you can use the formula:
\[ \text{Rate of Change} = \frac{\text{Change in Value}}{\text{Time Period}} \]
First, calculate the change in value:
\[ \text{Change in Value} = \text{Final Value} - \text{Initial Value} = 1750 - 1000 = 750 \]
Next, divide the change in value by the time period (3 years):
\[ \text{Rate of Change} = \frac{750}{3} = 250 \]
So, the constant rate of change is $250 per year.