sat suite question viewer
Algebra
/ Linear equations in two variables
Difficulty: Medium
Line is defined by . Line is parallel to line in the xy-plane. What is the slope of line ?
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Explanation
Choice B is correct. It's given that line is defined by . For an equation of a line written in the form , is the slope of the line and is the y-coordinate of the y-intercept of the line. It follows that the slope of line is . It's also given that line is parallel to line in the xy-plane. Since parallel lines have equal slopes, line also has a slope of .
Choice A is incorrect and may result from conceptual or calculation errors.
Choice C is incorrect. This is the y-coordinate of the y-intercept of line , not the slope of line .
Choice D is incorrect and may result from conceptual or calculation errors.