Answer:
Third inequality has dashed boundary.
Explanation:
An equality has dashed boundary on graphing when it strictly less than or strictly greater than Symbolically ( < or > sign in the inequality) 
boundary line is is solid line when the inequality is with symbol of equality also ( < = or > = ) 
Here we can see that all the inequalities except third one has symbol less than or equal to or greater than or equal to . And third inequality is with 
symbol > (greater than ) that mean strictly less than ,therefore on graphing 
 third inequality gives dashed line boundary.