Find the domain and range and describe the level curves for the function f(x,y).
-f(x, y) =
A) Domain: all points in the xy-plane; range: real numbers z ≤ 0; level curves: lines 8x - 10y = c, c ≤ 0
B) Domain: all points in the xy-plane; range: real numbers z ≥ 0; level curves: lines 8x - 10y = c
C) Domain: all points in the xy-plane; range: all real numbers; level curves: lines 8x - 10y = c, c ≥ 0
D) Domain: all points in the xy-plane; range: all real numbers; level curves: lines 8x - 10y = c

Question

Find the domain and range and describe the level curves for the function f(x,y).
-f(x, y) = 
A) Domain: all points in the xy-plane; range: real numbers z ≤ 0; level curves: lines 8x - 10y = c, c ≤ 0 
B) Domain: all points in the xy-plane; range: real numbers z ≥ 0; level curves: lines 8x - 10y = c 
C) Domain: all points in the xy-plane; range: all real numbers; level curves: lines 8x - 10y = c, c ≥ 0 
D) Domain: all points in the xy-plane; range: all real numbers; level curves: lines 8x - 10y = c

Quizplus · Accepted Answer

The Answer is D

Find the Domain and Range and Describe the Level Curves