Please explain in an easy way how to evaluate the following.

Hi there!

The | | signs mean that we must make the value positive, so:

(a)  | -5 + 9 | =

Solve for the inside:

| 4 | = 4

(b)

| -5 | + 9 =

Make the value positive:

5 + 9 = 14

sample answer: you can determine whether each element of the domain is paired with exactly one element of the range. for example, if given a graph, you could use the vertical line test; if a vertical line intersects the graph more than once, then the relation that the graph represents is not a function.