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One line has slope 4. A line perpendicular to it has slope:
APlus a quarter
BMinus a quarter
CPlus four units
DMinus four units
Answer & Solution
Correct answer: B. Minus a quarter
1. Perpendicular slopes are negative reciprocals.
2. Flip the fraction and change the sign.
3. The slope is minus a quarter.
_Source: OpenStax College Algebra 2e, Chapter 2, Equations and Inequalities._
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