Question

Which relation is also a function?

A. {(-5, 3) (6, 3) (1, 3) (2, 3)}
B. {(-1, 5) (2, 6) (1, 5) (2, 8)}
C. {(3, 6) (3, -2) (3, 4) (3, 0)}
D. {(0, -2) (1, 7) (2, 3) (0, -1)}

Answer 1

A since there are is only one y value for every x value

Answer 2

As you will see that in A that there is no 2 the same first coordinate of every pair

Answer 3

can you help me identify the relation that is also a function?

A. {(0, -1) (1, -2) (2, -3) (-1, 2)}
B. {(1, 0) (2, 3) (3, -1) (1, 5)}
C. {(4, 2) (4, -3) (9, 3) (9, -3)}
D. {(5, 4) (5, 1) (5, 3) (0, 5)}

Answer 4

Ok you guess this time

Answer 5

ok one sec

Answer 6

ok let me tell you what you should be looking out for

Answer 7

ok awesome

Answer 8

ok lets take for example in A the first paired coordinate is (0,-1)
0 is the x-coordinate and -1 is the y-coordinate

Answer 9

ok

Answer 10

Now if you see 2 the same x coordinates in one group and diff y coordinates then its not a function

Answer 11

Lets look at B

Answer 12

B. {(1, 0) (2, 3) (3, -1) (1, 5)}
As you can see in this group it has (1,0) and (1,5)

Answer 13

yup so that cant be right

Answer 14

exactly so which one would be a function?

Answer 15

Is A a function?

Answer 16

yeah

Answer 17

YAAAAAAAAAAAAAAAAAAAAAAAA

Answer 18

awesome that is really easy actually just look for the same number twice and its wrong YEAH haha

Answer 19

ok lets go thru another exanple

Answer 20

nice work :) Nice to have helpful people around, isn't it :)

@swissgirl, now just teach @elizabeth.a.fairweather how to get excited like that! :)

Answer 21

A. {(1.5, 4) (2, 4) (2.5, 5) (3, 5) (2, 6)}
B. {(-1, 3) (-1, 2) (-1, 4) (-1, 5) (-1, 6)}
C. {(-2, 0) (1, 3) (-2, 1) (1, -3) (-2, 6)
}D. {(1, 7) (2, 3) (4, 10) (6, 12) (8, 15)}

Answer 22

so it cant be a

Answer 23

obviously not b haha

Answer 24

yaaaaaaaaaaaaaaaaaaaaa

Answer 25

not c its definetely D

Answer 26

Thanks @JakeV8 :)

Answer 27

righhtttttt

Answer 28

sweet

Answer 29

alrighty so you got it. Great work @elizabeth.a.fairweather

Answer 30

:)