A sequence is defined by the following:
an = 4n-1
What is ag8?

20 POINTS!!!

i belive those are the ones that are under 90 degreese.

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.