ok to solve this problem with out a graphic calculator then you would do it the old fashion way.
plug in values for x and figure out y
i will suggest plugging in -6, -3, 0,3,6,9,12 etc anything with 3 as a multiple
the answer for all the y to the x i told you to plug in would be, -4, -3, -2, -1, 0, 1, 2,
Now graph it but instead of a solid line make a dash line
since you know the y is more then what this line is wort you would shade abobe that line.
