Work out the size angle DEF
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The domain of a relation is the set of all the x-terms of the relation.
Let's look at an example.
In the image provided I have attached a relation and we want to list the domain.
So, I will list all the x-terms. Notice however that I listed 7 once even though it appears twice in the relation. When listing the domain, you don't repeat the x-terms.
To find the slope of this line, we must use the equation:
Where and
can be assigned to either point.
Let's use (-6, -13) as the point "1" and (3, -1) as the point "2":
So now we know that the slope between these two points is .