Determine the Continuity of the Function $f ( x , y ) = x + 6 y + 5$

Multiple Choice

Determine the continuity of the function $f ( x , y ) = x + 6 y + 5$

A) continuous except at $( 6,5 )$
B) continuous except at $( 0,0 )$
C) continuous except at $( 6,0 )$
D) continuous except at $( 0,5 )$
E) continuous everywhere