Answer: No, he should have put the x values in the denominator and the y values in the numerator
Explanation:
The formula for calculate the slope is:
![m=(y_2-y_1)/(x_2-x_1)](https://img.qammunity.org/2020/formulas/mathematics/high-school/pj0y5tg37a7a9ase0auiwe687ez8iaw2vl.png)
You can observe in the formula that the y values must be in the numerator and the x values must be in the denominator.
Then, the correct slope is:
![m=(14.00-13.00)/(12-8)\\\\m=(1)/(4)](https://img.qammunity.org/2020/formulas/mathematics/college/zq0ivpni650pt251wzr8zw5569apo4rauq.png)
Then, Garret's slope is incorrect, because he should have put the x values in the denominator and the y values in the numerator.