Answer
slope: $m = -1$
Work Step by Step
The formula to find the slope of two points on a line is:
$m = \dfrac{y_2 - y_1}{x_2 - x_2}$, where $m$ is the slope and $(x_1, y_1)$ and $(x_2, y_2)$ are two points on the line.
Let us plug the points $(4, 5)$ and $(1, 8)$ into the formula:
$m = \dfrac{5 - 8}{4 - 1}$
Simplify numerator and denominator:
$m = \dfrac{-3}{3}$
Reduce the fraction:
$m = -1$
