In case 1, the x value would have to be lower than 16, therefore any value of x lower than 16 is true to this statement. This graph would be a straight line through x=16. It would be a solid line if its less than or equal to, or in this case, if just less than, a dashed line should be used. The value which is in the aceptance region should be shaded in, so the left side of the line is to be shaded. In case 2, a dashed line through x=17 with the right hand side shaded.