y=x+1 crosses the y-axis at (0,1). To solve this, I found out the y-intercept which is 1. I know that the y-intercept is 1 because in the equation y=mx+b, the 'b' is the y-intercept. The y-intercept is always on the y-axis and so this is where this equation crosses the y-axis.
Below is a picture of the equation y=x+1