Answer
$$y-2=4(x-4)$$
Work Step by Step
We first find the slope:
$$\frac{y_2-y_1}{x_2-x_1}$$
$$\frac{2+2}{4-3}=4$$
We now use point slope form to have:
$$y_2-y_1=m(x_2-x_1)$$
$$y-2=4(x-4)$$
Note that either point will work in the equation.