Question

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

Answer 1

@clynnew

Answer 2

This one I'm lost on i do think it could be D though

Answer 3

Okay so for these, there is something called a vertical line test. When you're looking at graphs trying to figure out if it is a function or not you should ask yourself, Can I draw a vertical line (anywhere) that will hit the graph two times?

Answer 4

Or no idk this time

Answer 5

Ok so is it B then?

Answer 6

B hits top and bottom right?

Answer 7

Okay so lets look at your graphs,

Answer 8

A does it to though and D

Answer 9

Crappy drawing but, A can't be it.. you can draw a straight line through the graph in several places.