Question

Give an example of a relation that is NOT a function and explain why it is not a function.

Answer 1

y^2 = x

Answer 2

i guess 2nd place is silver?

Answer 3

a function doesn't pass the verticle line test,( for future reference)

Answer 4

Right.

Answer 5

verticle line test is an analytic tool :) not proofable

Answer 6

yeah but it's a good visual tool nonetheless

Answer 7

for any given input; a function will return only 1 output

Answer 8

y = x^2

for each value of x, there is, at most, one value for y

y = sqrt(x) <=== NOT a function... one value for x = more than one value for y
. . . If x = 4 ... then y = + or - 2 <=== multiple values for y

Answer 9

a circle is a good example of a "not" a function

Answer 10

y = sqrt(x) IS a function

Answer 11

y = sqrt(x) is actually a function


yet another most popular item of confusion in math...

Answer 12

\[y ^{2} = x\]
Each x has two y values therefore not a function

Answer 13

y = +-sqrt(x) is not a function

Answer 14

also we would have to define which variable is the abscessed and ordinated

Answer 15

y=+-(anything)
is not a function :)

Answer 16

but convention says x is independant and y is dependant

Answer 17

a circle with radius bigger than 0

Answer 18

i drew a circle with a radius smaller than 0 :)

Answer 19

lol

Answer 20

oh.. I thought you drew a circle with radius too big to fit in the draw tool.

Answer 21

beautiful work of art...wait so you're drawing a blank on this one?

Answer 22

Can u draw one with an imaginary radius?

Answer 23

it was either that or make an eddy into another dimension

Answer 24

do you the only circle that is a function is a circle with 0 radius

Answer 25

like an imaginary fried ?

Answer 26

Give an example of a relation that is NOT a function

My sister...

Answer 27

fried supposed to be friend (freudian slip ?)

Answer 28

my mother

Answer 29

Everything u don't know what it is is a relation....