You can put this solution on YOUR website! the graph of x < 4 will have a vertical dashed line at x = 4 and the shaded region will be to the left of that line.
it will look like this:
if the inequality was x <= 4, then the vertical dashed line would have become a vertical solid line.
the dash line means less than or greater than, but not equal.
the solid line means less than or greater than or equal.
