Answer
$m=-\frac{22}{455}$
Work Step by Step
To find the slope, we use the formula $m=\frac{y_2-y_1}{x_2-x_1}$.
We plug in the $x$ and $y$ values from the given coordinate pairs: $m=\frac{3-5.2}{3.25-(-42.25)}$
We simplify above and below the fraction bar with subtraction: $m=\frac{-2.2}{45.5}$
We write this as a fraction of whole numbers by multiplying by $\frac{10}{10}$: $m=-\frac{22}{455}$