Since there is no b in the equation, y=mx+b, the equation would just be y= 1/5x+0
So you would plot the point (0,0) and you would need to then graph the slope, 1/5x.
Assuming you don't know how to graph the slope, (not saying you don't, its just for those who may not know.)
You would go up 1 from the point (0,0) and you would go right five and plot that point and keep going on your graph. You should then put a line to connect those points! Like connect the dots.. C:
In the end, your graph should look like this: