Question

MEDALL!!!!
Which of the sets of ordered pairs represents a function?

A = {(1, –2), (3, –5), (5, 2), (7, 5)}

B = {(4, 2), (4, –2), (9, 3), (9, –3)}


Only A
Only B
Both A and B
Neither A nor B

Answer 1

I think only A but I'm not to sure

Answer 2

do you mind helping me with one more? xD

Answer 3

yah sure

Answer 4

If y = 5x – 4, which of the following sets represents possible inputs and outputs of the function, represented as ordered pairs?


{(0, –4), (2, 6), (4, 20)}
{(0, –4), (2, 6), (4, 16)}
{(0, 4), (2, 6), (4, 16)}
{(0, 4), (2, –6), (4, 20)}

Answer 5

um ok hold on I have to write this down and figure it out

Answer 6

Do you know the definition of a function?

Answer 7

it is b for sure

Answer 8

thank you for your help!!

Answer 9

yup np

Answer 10

B is wrong for sure...

Answer 11

how prove it

Answer 12

i just worked it out ik it is right

Answer 13

any input can have only one output

Answer 14

i.e. a function can be one-to-one or many-to-one but not one-to-many

Answer 15

https://www.mathsisfun.com/sets/function.html

Answer 16

^^^ That explains everything