Find the domain and range and describe the level curves for the function f(x,y).
-f(x, y) = -6x + 8y
A) Domain: all points in the $x y$-plane; range: real numbers $z \geq 0$; level curves: lines $- 6 x + 8 y = c , c \leq 0$
B) Domain: all points in the $x y$-plane; range: all real numbers; level curves: lines $- 6 x + 8 y = c$
C) Domain: all points in the $x y$-plane; range: all real numbers; level curves: lines $- 6 x + 8 y = c , c 0$
D) Domain: all points in the $x y$-plane; range: real numbers $z \geq 0$; level curves: lines $- 6 x + 8 y = c , c \geq 0$

Question

Find the domain and range and describe the level curves for the function f(x,y).
-f(x, y) = -6x + 8y 
A) Domain: all points in the $x y$-plane; range: real numbers $z \geq 0$; level curves: lines $- 6 x + 8 y = c , c \leq 0$
B) Domain: all points in the $x y$-plane; range: all real numbers; level curves: lines $- 6 x + 8 y = c$
C) Domain: all points in the $x y$-plane; range: all real numbers; level curves: lines $- 6 x + 8 y = c , c > 0$
D) Domain: all points in the $x y$-plane; range: real numbers $z \geq 0$; level curves: lines $- 6 x + 8 y = c , c \geq 0$

Quizplus · Accepted Answer

The Answer is B

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