We are given the following equation in the point-slope form.

Recall that the general form of the equation in point-slope form is given by

Comparing the given equation with the point-slope form, we have
m = -2
Point = (1, 4)
Recall that the slope is given by

Start at point (1, 4) then 2 units down and 1 unit to the right.
As you can see, we started at the point (1, 4) then sketched other points by going 2 units down and 1 unit to the right.