Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = -3x + 9y
A. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
c > 0
B. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: lines 
c ? 0
C. Domain: all points in the xy-plane; range: real numbers z ? 0 ; level curves: lines 
c ? 0
D. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
Answer: D
Mathematics
You might also like to view...
Show that the function is a solution of the wave equation.w(x, t) = ex - ct
A. Yes B. No
Mathematics
Solve the equation.
= x + 8
A. {6} B. {5} C. {-5} D. {-6}
Mathematics
Solve the formula for the specified variable.F = 
C + 32 for C
A. C = 
(F - 32)
B. C = 
C. C = 
D. C = 
(F - 32)
Mathematics
Find the domain of the function.f(x) = 
A. {x|x ? 25} B. {x|x ? 25} C. {x|x ? 5} D. {x|x ? 5}
Mathematics