How do I do this while I show all my work?

One way to determine the slope of a line is from two points on a line.
We can use the ones already indicated on the graph, (0,4) and (3,5).
The slope is change in y divided by change in x,
[tex]m= \dfrac{5 - 4}{3 - 0} = \dfrac 1 3[/tex]
Answer: 1/3