How do u know y is a function of x? My hw provides me with an equation and i need to find out the following answer. THANKS

Question

anonymous · Answer

This is the P section of my calculus section btw

akashdeepdeb · Answer

we know that y is a function of x when EVERY x value has  A UNIQUE  y value!
And we write that as y = f(x) read as y is equal to a function OF x!
Getting me? :)

anonymous · Answer

I understand but I am still unsure as to how do i find it

anonymous · Answer

Like x^2  + y^2 = 4

anonymous · Answer

Is there really a way to check it?

anonymous · Answer

Like an equation or something?

akashdeepdeb · Answer

This will not be considered a function!

anonymous · Answer

oh yea i need to study my math vocab

akashdeepdeb · Answer

There is NO equation to check it but if you know equations of ellipses, circles and parabolas and lines then you can find out from there!
For example:

akashdeepdeb · Answer

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