Answer - slope is 1/3
You can find slope on your graph by picking two points and finding rise (y axis) over run (x axis)
Here we see a rise up of +1 and a run to the right of + 3.
y over x = 1/3 slope
We can also pick two coordinates and use slope formula to find slope.
Coordinates
(0, 2) and (3, 3)
y 2 - y1 over x2 over x1
3 - 2 over 3 - 0 = 1/3 slope
I attached a graph to help