What is the slope of the line through and ?

Answer and explanation

Correct answer: D. 4

  1. Step 1: State the slope formula: .
  2. Step 2: Substitute and : .
  3. Step 3: Simplify numerator and denominator: .
Answer
.
Why not the others: - 1/4 inverts the slope formula as . - -4 introduces an extraneous negative sign. - 5 adds rather than subtracts the constant term in the final step.

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What is the slope of the line through… | ACT Lines and slope