AlgebraMediumSlope between two points, with a negative
Algebra practice question
In the xy-plane, a line passes through (1, 4) and (5, −2). What is the slope of the line?
- A. −3/2Correct
- B. 3/2
- C. −2/3
- D. −6
Answer: A. −3/2
Slope = (−2 − 4)/(5 − 1) = −6/4 = −3/2.
Why the other answers are wrong
- B. 3/2
- 3/2 has the wrong sign; y falls as x rises.
- C. −2/3
- −2/3 is the reciprocal (run over rise).
- D. −6
- −6 is the rise alone, not divided by the run of 4.
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