Question

Determine which relation is a function.

A. {(–5, 1), (–5, 0), (–2, 1), (–1, 4), (6, 2)}

B. {(–5, 1), (–2, 0), (–2, 2), (3, 4), (6, 2)}

C. {(–5, 1), (–2, 0), (–1, 1), (2, 4), (6, 3)}

D. {(–5, 3), (–2, 0), (–1, 2), (6, 4), (6, 3)}

Please explain.

Answer 1

Is it C?

Answer 2

A relation CANNOT be a function if it repeats an x value, so yes, C.

Answer 3

Ok, thanks :) Can you check a few more?

Answer 4

I'll try :)

Answer 5

Ok, thanks! :)

Answer 6

Determine which relation is a function.

A - http://static.k12.com/calms_media/media/1348000_1348500/1348048/1/96da73175b781c9eb989ef01bdf190f6637ad48d/116023a.jpg

B - http://static.k12.com/calms_media/media/1348000_1348500/1348049/1/309ff705090582b2b57c95f6beb089d3035a4fae/116023b.jpg

C - http://static.k12.com/calms_media/media/1348000_1348500/1348050/1/d6d9c130e860bb1dd2185d723377fd1fb047c348/116023c.jpg

D - http://static.k12.com/calms_media/media/1346000_1346500/1346425/2/d0a99c48040788a7b607515dc740fc0892478721/116023d.jpg

Is it D?

Answer 7

Use the horizontal line test, if the line intersects only at one point, it is a function.

Answer 8

Yup! :D

Only D can be a function because it does not repeat any x values.

Answer 9

So yes it is D.

Answer 10

Thank you both! :D

Answer 11

You're welcome! ^_^

Answer 12

I have 3 more, can you take them? :P

Answer 13

I'll try my best! :)

Answer 14

Thanks :)

Determine which relation is a function.

A - http://static.k12.com/calms_media/media/1346500_1347000/1346532/1/dcb0479927bf2f6b88655b05885cb5c63d41b4f1/HS_A1G2_S2_10_03_116042a.jpg

B - http://static.k12.com/calms_media/media/1346500_1347000/1346533/1/a9b9d7eb08a32a0ac51c19c132806d7a0e3b82a1/HS_A1G2_S2_10_03_116042b.jpg

C - http://static.k12.com/calms_media/media/243000_243500/243032/1/374682ee8625ec2ab7a388df8263fac6f38c3313/VHS_ALG_S2_01_L203_L303_LQ_3C.gif

D - http://static.k12.com/calms_media/media/243000_243500/243033/1/07d0ffef1f4e6f4dfc7e2b0a6b695877fa43eaf8/VHS_ALG_S2_01_L203_L303_LQ_3D.gif

This one is a bit confusing to me.. can you explain, don't tell me the answer!

Answer 15

Okay, just give me a sec.

Answer 16

Ok

Answer 17

In order to find the answer, you must use a vertical line test.

Answer 18

Please wait while I draw a nice example! :)

Answer 19

Hmm.. so B is wrong? :/

Answer 20

Ok :)

Answer 21

Please see the attachment. This is an example of a curve that is NOT a function. The red line is the vertical line I used to "test" whether it was a function or not.

Answer 22

So you are right, B is NOT a function. :)

Answer 23

Is the answer C?

Answer 24

So it can't be a function.

Answer 25

Or is it A... :/ I'm sorry, this is new to me..

Answer 26

Oh, I see..

Answer 27

Don't apologize, I like helping people!

And yes it is A ! :D

Answer 28

Thanks! :)

Answer 29

A is the only one that does NOT repeat an x value.

Answer 30

You're welcome. ^_^

Answer 31

Ok, I have one more?

Answer 32

Okay, I'll try! :)

Answer 33

Evaluate the function at x = –2.

A. y = –2
B. y = 0
C. y = 2
D. y = 3


http://static.k12.com/calms_media/media/1346000_1346500/1346429/1/f6d9c205924838a44aedf93311fef0cf05a3eea6/HS_A1G2_S2_10_03_ART7.jpg

Answer 34

y = 2? :/

Answer 35

Good! ^_^

"evaluate the function at x = -2" means "What is y when x = -2"!

Answer 36

Yay! brb

Answer 37

:D

Answer 38

Oh.. nvm :P Thanks, I have 1 question, I answered it, but can you just check if its correct?

Answer 39

Okay, I'll do my best!

Answer 40

Thanks! :)

Which situation does this graph best represent?

A.Cara made a graph to chart the accumulation of snow (in inches) during the course of a 5-hour snowfall.

B.Eric made a graph to display the growth (in inches) of his puppy over a 5-day period.

C. Milo made a graph to show how many hours he worked each day of a 5-day workweek.

D. Sarah made a graph to display how many miles she traveled during a 5-minute bike ride.

http://static.k12.com/calms_media/media/243000_243500/243060/1/0e5d727ef629b9ba1f439a6adb8a48d1ffc024c8/VHS_ALG_S2_01_L303_LQ5.gif

It's C

Answer 41

Yes, C is the only one that makes sense to me.

Answer 42

Ok, thanks :) That's all!

Answer 43

Your welcome! ^_^

Answer 44

Well, I gtg. Thanks again for your help!