You can put this solution on YOUR website! 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 . 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.
Hope this helps!