Answer:
The slope is 2.
Explanation:
Slope is just "rise" over "run," or the change in y divided by the change in x.
Start at the point (0,2).
To get to the point (1,4) you have to move up 2 units on the y-axis, and right 1 unit on the x-axis.
So Δy = 2 and Δx = 1:
slope = 2/1 = 2
Note that if you started at the right-most point, (1,4), you'd go down 2 (which is negative) and left 1 (which is also negative), so you'd have:
-2/-1 = 2
The same answer, because the negatives cancel out.
So you can do it either way, it's just easier if you pick the first point to the be the left-most one.