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lLovePhysics
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Is: [tex]y^{2}=x^{2}-1[/tex] a hyperbola or half a hyperbola? My textbook claims that it is a NOTfunction so I guess it is a hyperbola... However, I'm still perplexed by radicals. They simply confuse me because I don't know if there are +/- signs in front of it or not. When graphing equations such as the above, do you take the positive, negative, or both of the radical? The same question applies for sleeping (horizontal) parabolas. I know that the calculator only draws one half, but in reality, are the two sided or just the positive half side?
If the other side is present are these kind of graphs all NOT functions then? Thanks in advance.
EDIT: Sorry I mean to say that my textbook said it was NOT a function...
If the other side is present are these kind of graphs all NOT functions then? Thanks in advance.
EDIT: Sorry I mean to say that my textbook said it was NOT a function...
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