This is one of the questions I had trouble with. I had to find the y-intercept of this equation. When finding the y-intercept, you are supposed to input x as 0, because in a y-intercept on an xy graph the x would have to be zero. Here is a picture that shows this,

However, I made the mistake of imputing y as 0, instead of x. Here is the incorrect equation,

The 3x should have cancelled out, instead of the 2x. Here is the correct equation,

To not make this mistake again, I wrote down this multiple times,

X-int = (x,0)

Y-int = (0,y)