Answer:
the 4th answer : 4
Explanation:
the easiest way to see the slope is focusing on the points with integer coordinates.
so, we see that when x increases by 4 units, y decreases by 1 unit.
as the slope is the ratio "y coordinate change / x coordinate change", it is therefore -1/+4 = -1/4.
the perpendicular slope is turning the original slope upside-down and flips the sign.
it is therefore
4/1 = 4.