closed dot means it includes that number so in this case x is least than or equal to -8 and open dot means it doesn't include that value so x is less than -3 and does NOT include -3
and for the y value it's pretty self explanatory if u just count it (i might be off by a little cuz the photo quality is kinda fuzzy but i hope u get the gist!)
X- the total number of families in Smithville<span>. (2/3)x - the number of home owning families. At the same time, </span> the number of home owning families is 480.