Answer:
4
Step-by-step explanation:
We can use the y-y/x-x formula.
We need to find two points that are a whole number.
(0,10) -- 0 is the x coordinate, 10 is the y coordinate.
(20,90) -- 20 is the x coordinate, 90 is the y coordinate.
10-90 = -80
0-20 = -20
-80/-20 as a whole number is 4.
The slope is 4.
