I can’t graph it but since it’s in y=mx+b form you already know what the slope and y intercept are.
Find the 6 point on the y axis and mark a point there, then use the slope to graph the rest of the points, then you can make a line. Remember that slope is rise over run so in this case it would be fall -1.5 to the right and then run one space over. You don’t have to make a lot of points but it helps.