Question

Which numbers belong to the range of the relation {(4, –1), (–7, 2), (1, 2), (2, 1)}?

Choose all answers that are correct.

A.
2

B.
1

C.
–1

D.
–7

Answer 1

Hint: The range are the set of y values in the ordered pairs (x,y)

Answer 2

hmm hold on a sec...

Answer 3

So 2 - -1?

Answer 4

Or does it work that way with negatives...

Answer 5

the range is exactly
Range = { -1, 1, 2 }

Answer 6

the domain are the x values
Domain = {-7, 1,2,4}

Answer 7

Oh so... im supposed to get the range of both x and y then do something with them?

Answer 8

(of the relation w/e that means)

Answer 9

the question asks, which number belongs to the range . In other words, which numbers given in the choices are in the set of range values where range = { -1, 1, 2 }

Answer 10

almost out of time...

Answer 11

yeah got it

Answer 12

because 1 belongs to { -1, 1, 2 } , 2 belongs to { -1,1,2} , etc.

Answer 13

:)

Answer 14

yeah (facepalm) finally got it lol

Answer 15

it will help you if you learn the meaning of these specialized terms.
"relation" is any set of ordered pairs where there is no conditions on the set of ordered pairs.
a function is a special type of relation

Answer 16

sometimes a book will call a relation a 'binary relation' to emphasize that we are dealing with ordered pairs (a,b) as opposed to 3-tuples (a,b,c)

Answer 17

so for our purposes a relation is simply a set of ordered pairs , where an ordered pair is listed as (a,b) where order counts. So for example (1,2) is not equal to (2,1)

Answer 18

boop medal
MEDAL OF HONOR FOR BLOWING THE DUST OFF MY BRAIN!

Answer 19

CONGRATS

Answer 20

Your welcome :)