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

Algebra ->  Quadratic Equations and Parabolas -> 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      Log On


   

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) About Me  (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
y+=+4%2Fx
the graph looks like this:
+graph%28+300%2C+200%2C+-10%2C+10%2C+-10%2C+10%2C+4%2Fx%29+