Answer
$$m=-2$$
Work Step by Step
Using the equation for slope, we find:
$$ \mathrm{Slope}=\frac{y_2-y_1}{x_2-x_1}\\ m=\frac{3-5}{2-1}\\ m=-2$$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.