Question

FAN AND MEDAL: Purebred dogs are first assigned the same litter number until they are individually registered with a name. Then the dogs will be assigned a unique registration number with a dog registry. Many people choose to have a microchip implanted in the dog so that it can be read to immediately find the dog's owner.

Which of the following relations is not a function?

(registration number, litter number)

(microchip number, registration number)

(litter number, microchip number)

(microchip number, litter number)

Answer 1

@PinkSapphire

Answer 2

Please help?

Answer 3

IDK?

Answer 4

@tgawade

Answer 5

I didn't understand any of it! And i've had a sub for over two months...

Answer 6

I would believe it's B. For a relation to be a function, the 'x' variable, or the thing on the left side of the coordinate has to be unique.

Answer 7

Wouldn't the microchip number also be unique though?

Answer 8

Mhmm. That's why it's B. c: lol

Answer 9

OHH, it says which is not a function. Hold on.

Answer 10

So, yeah, that's why I was confused. XD

Answer 11

So, yeah, a function must have different x variables. Since every dog has the same litter number, it can't be used as the independent variable. So, C is correct.

Answer 12

Okay...lol Sorry. I'm not good at relations and functions.

Answer 13

Thanks! Do you mind helping me out with a few more? I'm still trying to understand all this...

Answer 14

Sure. :3

Answer 15

Would you like me to open it in a new question?

Answer 16

Up to you.

Answer 17

OKay, I will..this way you can get another medal lol

Answer 18

All of these mappings are relations, but
(litter number, microchip number)
is not a function, because the same litter number can be assigned to multiple dogs with different microchip numbers.

The other three relations are also functions, because a registration number or microchip number can only be mapped to one litter number, and a microchip number can only be mapped to one registration number.