What is the slope and equation of a line perpendicular to the y-axis passing through point (–5, –3)?
A. The slope is zero and the equation of the line is y = –3.
B. The slope is undefined and the equation of the line is y = –3.
C. The slope is undefined and the equation of the line is x = –5.
D. The slope is zero and the equation of the line is x = –5