Question

Which relation is a function?

https://gyazo.com/a32c7d2edd3a29d171c458499f57f2b4

https://gyazo.com/48971e31b40918e1d01d9c1e629de252

https://gyazo.com/3098b3685f13129b8588e184ff1515ce

https://gyazo.com/808a65fcc4898e9be451137726b949ae

Answer 1

Jamal. from Empire? :o lol

Answer 2

lol

Answer 3

A function has a line that is straight and goes in one direction.

Answer 4

the only line is the diagonal one

Answer 5

its not C or D

Answer 6

Its A.

Answer 7

As I remember a function can only have one to one and one to many relationships. What I meant is one \(y\) value can have one or two \(x\) values but not the other way around. :3

Answer 8

So it's confirmed A?

Answer 9

A function has a graph that it intersects any vertical line in only one point.
To see if a relation is a function using its graph, do the "vertical line test."
Imagine a vertical line drawn on the left side of the graph. Now imagine this line moving to the right. If the vertical line ever intersects more than one point, then the relation is not a function. If the vertical line intersects at most one point, then the relation is a function.

Answer 10

so it only crosses once

Answer 11

yes?

Answer 12

intersects*

Answer 13

Notice that with option A, any position you put the vertical line in, there is only one point of intersection of the vertical line and the graph of the relation, so this relation is a function.

Answer 14

Now try options B, C, and D.

Answer 15

b theres 2 places that it intercepts