Answer:
Slope = 0
slope is the same as gradient, so you will use the formula
M = y2 - y1 / x2 - x1 in this case (2,2) and (-1.2)
the first 2,is x1.then the other 2 in the first coordinate is y1 , for the last coordinate -1 is x2 and 2 is y2, use the formula I gave you , you will see that the answer is 0