What is the slope of the line through and ?
Answer and explanation
Correct answer: A. -3
- Step 1: State the slope formula: .
- Step 2: Substitute and : .
- Step 3: Simplify numerator and denominator: .
Answer
.
Why not the others: - -1/3 inverts the slope formula as . - 3 drops the negative sign from the slope. - -2 adds rather than subtracts the constant term in the final step.
Practise more Lines and slope.
Free questions with an explanation for every one, and full timed ACT mock tests.