Answer
The slope is $2$.
Work Step by Step
If we have two points, we can find the slope with the following formula:
$$m = \frac{y_2 - y_1}{x_2 - x_1}$$
Let us substitute the $x$ and $y$ coordinates of the given points into the formula:
$$m = \dfrac{9 - 3}{4 - 1}$$
Let us simplify using subtraction:
$$m = \dfrac{6}{3}$$
We can now simplify the fraction:
$$m = 2$$
The slope is $2$.
