Question

Which of the following graphs shows a function which is one-to-one?

Answer 1

can you zoom out and take a screenshot?

Answer 2

i cant zoom out

Answer 3

but thats the photo there isnt any change to it

Answer 4

the part that isnt in the photo is the same as the rest of the graph

Answer 5

okay let's look at each graph

remember, if it only touches the horizontal line once then it's a one-to-one function

so which one of these two is a one-to-one function?

It's going to be the one where the graph doesn't touch the red line twice
it can only touch it once

Answer 6

it can only touch the x line once?

Answer 7

the purple line of the graph can only touch the red line once

if the red line goes through the purple line more than once- it's not a one-to-one function

Answer 8

I just drew multiple red lines

but we look at one red line at a time

Answer 9

it can only touch the X line once?

Answer 10

the horizontal red line

horizontal is like this

Answer 11

I don't want you to think of it is as x-line because the x-axis is completely different

Answer 12

its A and D?

Answer 13

Yup!

Answer 14

thanks

Answer 15

No problem!