Question 18591
Definition of a Y-intercept is: A point in the equation where the X value equals 0
In your case, the slope is 1. Use {{{rise/run}}}. That means you will be "rising" 1 square and "running" over 1 square. 
You Y-intercept is (0,0)


You first plot the Y-intercept, then rise up 1 square, then go over 1 square.
Your graph should look something like this.

{{{graph(300,200,-5,5,-5,5,x)}}}
Hope this helps!