Question

Which of the following is a one-to-one function?

Answer 1

A

Answer 2

B

Answer 3

C

Answer 4

D

Answer 5

I know that it's not A because it is a parabola and a parabola is not a one-to-one function

Answer 6

the first one isn't a fuction
the second one is one to one
the third one is really really NOT one to one, it is a step function

Answer 7

the fourth one is also a step function, so definitely not one to one

Answer 8

B (the second one) is therefore the one-to-one function?

Answer 9

yes

Answer 10

thanks so much! :) I appreciate your help.

Answer 11

yw