Find the domain and range and describe the level curves for the function f(x,y).
-$$f ( x , y ) = \frac { 9 x ^ { 2 } } { y }$$
A) Domain: all points in the $x y$-plane; range: real numbers $z \geq 0$; level curves: parabolas $y = x ^ { 2 }$
B) Domain: all points in the $x y$-plane except $y = 0$; range: real numbers $z \geq 0$; level curves: parabolas $y = c x ^ { 2 }$
C) Domain: all points in the $x y$-plane; range: all real numbers; level curves: parabolas $y = c x ^ { 2 }$
D) Domain: all points in the $x y$-plane except $y = 0$; range: all real numbers; level curves: parabolas $y = x ^ { 2 }$

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The Answer of Find the domain and range and describe the level curves for the function f(x,y).
-$$f ( x , y ) = \frac { 9 x ^ { 2 } } { y }$$
A) Domain: all points in the $x y$-plane; range: real numbers $z \geq 0$; level curves: parabolas $y = x ^ { 2 }$
B) Domain: all points in the $x y$-plane except $y = 0$; range: real numbers $z \geq 0$; level curves: parabolas $y = c x ^ { 2 }$
C) Domain: all points in the $x y$-plane; range: all real numbers; level curves: parabolas $y = c x ^ { 2 }$
D) Domain: all points in the $x y$-plane except $y = 0$; range: all real numbers; level curves: parabolas $y = x ^ { 2 }$

Find the Domain and Range and Describe the Level Curves f(x,y)=9x2yf ( x , y ) = \frac { 9 x ^ { 2 } } { y }f(x,y)=y9x2​

Find the Domain and Range and Describe the Level Curves $f ( x , y ) = \frac { 9 x ^ { 2 } } { y }$