Question

Determine which relation is a function.

a. https://static.k12.com/calms_media/media/243000_243500/243030/1/9d7da95c78918ed75d524e4f6b201e4bd131428e/VHS_ALG_S2_01_L203_L303_LQ_3A.gif

b. https://static.k12.com/calms_media/media/243000_243500/243033/1/07d0ffef1f4e6f4dfc7e2b0a6b695877fa43eaf8/VHS_ALG_S2_01_L203_L303_LQ_3D.gif

c. https://static.k12.com/calms_media/media/243000_243500/243031/1/94ac2108bcc0ae61962be36204df63047b8127d6/VHS_ALG_S2_01_L203_L303_LQ_3B.gif

d. https://static.k12.com/calms_media/media/243000_243500/243032/1/374682ee8625ec2ab7a388df8263fac6f38c3313/VHS_ALG_S2_01_

Answer 1

@welshfella please help

Answer 2

To be a function it has to pass the vertical line test

Answer 3

So there shouldn't be more than 1 x-value to a y-value

Answer 4

Apply the vertival line test, If you can draw a vertical line which passes through the graph more than once then its NOT a function.

Answer 5

The vertical line can also be the y-axis itself.
If the graph itself is vertical then its passes through infinite teims so it not a function.

Answer 6

is this a?

Answer 7

a cant be a function as its avertical line.

Answer 8

No a is vertical line in itself so it cannot pass the vertical line test, try and find one where if you draw a vertical line it doesn't intersect with anything more than once

Answer 9

I cant see option d but one of b and c is a function.

Answer 10

would this be b?

Answer 11

can you draw a vertical line which pass through the curve b more than once?

Answer 12

no.