Answer:
1/2
Explanation:
Pick two points on the graph that are easy to read. A point is easiest to read if it lies on the intersection of grid lines.
For example, pick (10, 50) and (30, 60) which are easy to read.
slope = rise/run
rise = change in y
run = change in x
To go from (10, 50) to (30, 60), you go 20 units right. "20 units right" is a change of +20 units in x. The run is 20.
To go from (10, 50) to (30, 60), you go 10 units up. "10 units up" is a change of +10 units in y. The rise is 10.
slope = rise/run = 10/20
slope = 1/2