Which of the following is the equation of the line in the xy-plane that has slope 0
(I) x = 2
(II) y = 4
(III) x + y = 0 Choose the correct choice from the following answers:
A) I  B) II  C) III  D) I and II  E) II&III
y =mx+c therefore y-c= mx then m =(y-c)/x   m=0 means y = c constant ..= II   II
<result>B</result>
Which of the following is the equation of the line in the xy-plane that has slope 0
(I) x = 2
(II) y = 4
(III) x + y = 0