Consider the Figure Shown Below $f _ { 1 } ( x , y , z ) = 5 x + y + z$

Multiple Choice

Consider the figure shown below. Match the level curve with the function.

A) $f _ { 1 } ( x , y , z ) = 5 x + y + z$
B) $f _ { 2 } ( x , y , z ) = 5 x ^ { 2 } + y ^ { 2 } + z$
C) $f _ { 2 } ( x , y , z ) = 5 x - y + z$