Answer
$m = 2$
Work Step by Step
The formula to find the slope of two points on a line is:
$m = d\frac{y_2 - y_1}{x_2 - x_2}$, 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 $(1, 3)$ and $(4, 9)$ into the formula:
$m = \dfrac{3 - 9}{1 - 4}$
Simplify numerator and denominator:
$m = \dfrac{-6}{-3}$
Reduce the fraction:
$m = 2$