Question 976988
No dotted lines are part of writing any inequalities.  Inequalities which may be graphed will use dotted line to represent the related line for the corresponding EQUATION, but this is shown ON THE GRAPH as a dotted line, conventionally meaning to exclude the line and at the same time, indicate these points being excluded.  The dotted line is used for a strict inequality.  A solid line is still used for an INCLUSIVE inequality  (greater than or equal to; or less than or equal to...).