Question

Determine if the function is one-to-one.
A. yes
B. no

Answer 1

@mathstudent55

Answer 2

@zzr0ck3r

Answer 3

If you can draw vertical line through any part of the graph and it hits the graph more than once, then it is NOT one-to-one. Otherwise it is.

Answer 4

Can you draw such a line here?

Answer 5

no?

Answer 6

correct

Answer 7

so it IS one-to-one

Answer 8

This "test" will always work. It is called the vertical line test.

Answer 9

errrrrrr

Answer 10

sorry I mean horizontal

Answer 11

so the answer is yes?

Answer 12

replace everytime I said vertical with horizontal

Answer 13

Since there is not horizontal line that passes through the graph more than once, it IS one-to-one

Answer 14

Sorry, late night....

Answer 15

its okay, so the answer is A?

Answer 16

If you understood me you would not need to ask that question. Can you draw a horizontal line through the graph that touches more than once?

If your answer is NO then it IS one-to-one.

Answer 17

Look at the horizontal grid lines (left and right) do any of them pass through the line twice?

Answer 18

no so its A

Answer 19

Correct

Answer 20

Sorry, I just want to make sure you understand, this concept is a little weird because you CANT draw a horizontal line means it IS one-to-one. But once you learn to use this property, you get some easy points on the test.