Question

MEDAL TO WHOEVER ANSWERS

which relation is a function?
A. {(–3, 4), (–2, 5), (0, 9), (0, 12)}
B. {(8, –1), (2, –1), (3, 8), (2, 5)}
C. {(1, 2), (1, 5), (1, –1), (1, 4)}
D. {(7, 12), (1, –5), (3, –10), (2, –5)}

Answer 1

Do you know what a function is?

Answer 2

no

Answer 3

A function is a special relationship between values: Each of its input values gives back exactly one output value.

It is often written as "f(x)" where x is the value you give it.

Answer 4

okay but I still dont understand how to find a function

Answer 5

hmm

Answer 6

So basically the one, with all different outputs, would be the answer. Lets see..Look at the first one

Answer 7

x can only have one y in (x,y)

Answer 8

in {(–3, 4), (–2, 5), (0, 9), (0, 12)} you have 9 and 12 for 0
so its not a function

Answer 9

understanding it?

Answer 10

yes

Answer 11

It would help a lot if you made an x/y table

Answer 12

so tell me now
whats the answer

Answer 13

I think it would be D?

Answer 14

correct :)

Answer 15

thank you so much! (: