Explanation:
So this equation is in y=mx+b form where m is the slope and b is the y-intercept. and x just stays x
so you would begin by putting a dot (coordinate point) on 3 on the y axis (the up and down line)
then go down 2 over 1 and put and dot there. from that dot go down 2 over 1 etc.
I didn't know how to explain it with words but I hope this helps.