Q:

I don't know what the symbol means or what to do.

Accepted Solution

A:
Answer:Step-by-step explanation:That weird symbol means "element".  In our case, the elements of the domain (the x-values) are -15, -6, -1.  Which tells us that we are going to sub each one of the numbers into the equation and solve it for the corresponding y value.  That in turn gives us the coordinate point.  The equation isx + y = 6Subbing in first -15 for x:-15 + y = 6 andy = 6 + 15 soy = 21 and the coordinate point is (-15, 21).Subbing in -6 for x:-6 + y = 6 andy = 6 + 6 soy = 12 and the coordinate point is (-6, 12).Subbing in -1 for x:-1 + y = 6 andy = 6 + 1 soy = 7 and the coordinate point is (-1, 7)The second choice is the one you want.Just remember that x is the domain and any elements in the domain go in for x.Also remember that y is the range and any elements in the range go in for y