Which of the following is the equation of the line in the xy-plane that has slope 0
(I) x = 2
(II) y = 6
(III) x + y = 0
Choose the correct choice from the following choices
A) II &III  B) III  C) I and II only  D) I  E) II
y =mx+c therefore y-c= mx then m =(y-c)/x   m=0 means y = c constant ..= II   II
<result>E</result>
Which of the following is the equation of the line in the xy-plane that has slope 0
(I) x = 2
(II) y = 6
(III) x + y = 0