Question

Is x=2 a function?
Why or why not?

Answer 1

Can you name me two points that lie on x = 2?

Answer 2

1,2

Answer 3

(1,2) is a point on this line?

Answer 4

(1,2)
(2,2)

Answer 5

Those points lie on y = 2 since the y coordinates are both 2

Answer 6

Ugh...I was thinking it's a horizontal line. y=2
When I put it in calculator it looked that way.

Answer 7

The original equation is x = 2 correct?

Answer 8

Yes

Answer 9

So two points could be (2,3) and (2,5)

Answer 10

Notice how x = 2 maps to y = 3 AND y = 5 at the same time

Answer 11

Yes

Answer 12

A function has each allowed x map to ONLY ONE y value

So this is NOT a function

Answer 13

Only on output?

Answer 14

yes, one input ---> one output means it's a function

Answer 15

If you have one input ---> more than one output...then it fails to be a function