The unit rate refers to the slope of the line which passes through the given points. So, we need to find the slope with the following formula
![m=(y_2-y_1)/(x_2-x_1)](https://img.qammunity.org/2023/formulas/mathematics/high-school/78uaqhwt0aws3qfwxigaftpihnmb1gzxtp.png)
We are going to use points (4,5) and (8,10).
![m=(10-5)/(8-4)=(5)/(4)](https://img.qammunity.org/2023/formulas/mathematics/high-school/fih4p21demyjlqgqdmzotkn1t7jama7222.png)
Therefore, the unit rate is 5/4.
An interpretation of this unit rate is: while the vertical coordinate varies 5 units, the horizontal coordinate varies 4 units.