SOLUTION: In my textbook it says that xy=4 is a quadratic equation. Is this a mistake? I understand that it is not a linear equation but I thought quadratics had to have second power variabl

Question 257260: In my textbook it says that xy=4 is a quadratic equation. Is this a mistake? I understand that it is not a linear equation but I thought quadratics had to have second power variables
Can you help
Answer by drk(1908) (Show Source): You can put this solution on YOUR website!
This is not a quadratic, but a "hyperbola". If you solve for y, you get

the graph looks like this:

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