sat suite question viewer
Line in the xy-plane is perpendicular to the line with equation
. What is the slope of line
?
Explanation
Choice A is correct. It is given that line is perpendicular to a line whose equation is x = 2. A line whose equation is a constant value of x is vertical, so
must therefore be horizontal. Horizontal lines have a slope of 0, so
has a slope of 0.
Choice B is incorrect. A line with slope is perpendicular to a line with slope 2. However, the line with equation x = 2 is vertical and has undefined slope (not slope of 2). Choice C is incorrect. A line with slope –2 is perpendicular to a line with slope
. However, the line with equation x = 2 has undefined slope (not slope of
). Choice D is incorrect; this is the slope of the line x = 2 itself, not the slope of a line perpendicular to it.