Since you have the point where the x is zero which is the y-int of (0,3) so you can fill that one is first and to get the points of where x is 1 and 2 you would move -2 and up 1 since that is is the slope so your points would be (1,1) and (2,-1) and you would go the other way from (0,3) to find the negatives you would move up 2 and left one which would be (-1,5) and (-2,7). Hope this helps!! :D