slope = rise/run
Pick two easy to read points on the line.
Look at (0, 6) and (4, 7) which are on grid intersections.
To go from (0, 6) to (4, 7), you go 1 unit up.
Rise is going up or down, so the rise is 1.
Then you go 4 units to the right.
The run is 4.
slope = rise/run = 1/4
