Question 1086290
<font color="black" face="times" size="3">Each point is of the form (x,y). The x coordinate is listed first. 


The domain is the set of all possible x values of a relation. So it's simply the set of all the x coordinates.


The x coordinates are {4, 5, 6, 8} which is why the answer is <font color=red>choice A</font></font>