The slope is 3/2, 1 1/2, or 1.5 (however you need it.
To find the slope for the graph simply find where the line intersects two points evenly. Coordinate (2,3) is an example of this. Next while trying to find slope you want to use rise over run (from the origin in this case). You would rise 3 times and run 2 times to get to the point (2,3). Therefore your slope would be 3/2.
