Slope is about how steep a line is.
When finding the slope from a line on a graph we use the method of rise over run .
- Rise is how far up
- Run is how far along
You can also think of it as the change in y over the change in x.
The slope here is 4/6 which can simplify to 2/3.
In this example the slope is 3/5.
For more information on slope click here.