Question

Which relation is a function?


A.


(–25, 16), (0, 16), (–25, 18)


B.
(19, 11), (34, 12), (34, 10)


C.
(35, 31), (24, 15), (12, 0)


D.
(34, 30), (18, 17), (34, 15)

Answer 1

@Here_to_Help15 @RoseStorm @SarahMotionless

Answer 2

@haleyelizabeth2017

Answer 3

Sorry Suck at math

Answer 4

@aaronq @amistre64

Answer 5

function has a specific definition, what is it?

Answer 6

@brandbear @~*Ashtyn*~ @PizzaLover123

Answer 7

SneliS, I'll let @amistre64 help you. I'm not good with functions....sorry!

Answer 8

like @SarahMotionless said "Sorry I suck at math" so do I :(

Answer 9

A function is a special relationship where each input has a single output.

Answer 10

"not a function" tends to have a more useful definition

if the same input has more than one output, then its not a function

if the same value of x is related to 2 or more values of y, its not a function

Answer 11

ok

Answer 12

this isnt math, its just observation. you are comparing things.

Answer 13

yes

Answer 14

heres a simple method, stack the points

(–25, 16),
( 0, 16),
(–25, 18)
^^
if we have the same x value, it better have the same y value.

what does x=-25 produce?

Answer 15

(–25, 16),
(–25, 18)
^^
does 18 = 16?

Answer 16

no?

Answer 17

why is that a question .... 16 things is not 18 things, so they are not equal.

Answer 18

so this is not a function, test the others out

Answer 19

cuz i wasnt sure

Answer 20

you should be sure that 16 is not 18 ..

Answer 21

i say it's D

Answer 22

because half of 30 is 15 right?

Answer 23

can you prove it? i gave you a way to test it

Answer 24

i see none of your work

Answer 25

15 is half of 30

Answer 26

that is not the method i demonstarted

good luck

Answer 27

so it is D?

Answer 28

thank you