Question

Help, I'll fan and medal
Can someone help me with a one-to-one function?

Answer 1

How can I tell if this is a one to one function

Answer 2

have you ever heard of the vertical line test?

Answer 3

Yes

Answer 4

well

Answer 5

for one to one functions we have the "horizontal line test"

Answer 6

If it touches it twice it isn't a function?

Answer 7

that's for vertical

Answer 8

for horizontal it's the same thing, just with a horizontal line instead

Answer 9

so, if you can draw a horizontal line that touches the function more than once, it is NOT a one to one function

Answer 10

And in this case, with that graph, it touches the function more than once, so it is not a one to one function.

Answer 11

yes

Answer 12

so, what do you think?

Answer 13

is the graph one to one?

Answer 14

It is not a one to one @Vocaloid

Answer 15

great!