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Mathematics 16 Online
OpenStudy (anonymous):

Give an example of a relation and why it is a function?

OpenStudy (anonymous):

this is my last one!

OpenStudy (lgbasallote):

is there something wrong here?

OpenStudy (anonymous):

no

OpenStudy (lgbasallote):

you ask for a relation then ask why it's a function?

OpenStudy (lgbasallote):

maybe you mean example of a relation that is a function?

OpenStudy (anonymous):

a relation that is a function

OpenStudy (anonymous):

yes sorry!

OpenStudy (lgbasallote):

ahh glad to see my mind reading powers arent rusty yet

OpenStudy (anonymous):

:)

OpenStudy (lgbasallote):

anyway...do you need graph? equation?

OpenStudy (anonymous):

no just a written response

OpenStudy (lgbasallote):

give me a polynomial..any polynomial you can think of

OpenStudy (anonymous):

and an eqaution

OpenStudy (anonymous):

4xy+3x-5

OpenStudy (lgbasallote):

uhh...just one variable..

OpenStudy (anonymous):

o srry! 4+3x-5

OpenStudy (lgbasallote):

i'll take that as \(4x^2 + 3x - 5\) now put f(x) =

OpenStudy (anonymous):

x=3

OpenStudy (lgbasallote):

no.. i meant put it as f(x) = 4x^2 + 3x - 5

OpenStudy (lgbasallote):

btw..i have no idea where x = 3 came from

OpenStudy (anonymous):

srry im really confused

OpenStudy (lgbasallote):

a function is just a polynomial equated to f(x)

OpenStudy (lgbasallote):

that's why i asked you for a polynomial

OpenStudy (lgbasallote):

then i told you to equate it to f(x)

OpenStudy (anonymous):

so do i have to solve the eqaution?

OpenStudy (lgbasallote):

f(x) = polynomial <---function

OpenStudy (lgbasallote):

nope

OpenStudy (anonymous):

so how is it a function

OpenStudy (lgbasallote):

so...now...why is it a function? you just define a function.. the definition of a function is "there is only one value of y that correspond to a certain x" so you say, "Because for every x, there is only one corresponding y value" as simple as that

OpenStudy (lgbasallote):

got it?

OpenStudy (anonymous):

yes! thank you so much

OpenStudy (lgbasallote):

welcome

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