What is the slope of a line that is perpendicular to the line with equation ?

Answer and explanation

Correct answer: A.

  1. Step 1: Find slope of given line: , so .
  2. Step 2: Perpendicular lines have negative reciprocal slopes: .
Answer
-\frac{4}{3}.
Why not the others: '' is the slope of parallel lines; '' forgets the negative sign; '' makes a sign error without reciprocating.

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