HardMath· Algebra· Linear equations in two variables· MCQ
Line in the xy-plane is perpendicular to the line with equation . What is the slope of line ?
A
B
C
D
The slope of line is undefined.
Correct answer: A
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.
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id cb_question_bank:93899c3a-2282-4a6e-aa42-0fc08824645e · question 98d3393a · IBN 10934-DC
· JSON
is undefined.