AlgebraHardSlope from standard form with a negative
Algebra practice question
What is the slope of the line 5x − 2y = 8 in the xy-plane?
- A. 5/2Correct
- B. −5/2
- C. 2/5
- D. −4
Answer: A. 5/2
Solve for y: −2y = −5x + 8, so y = (5/2)x − 4. The slope is 5/2.
Why the other answers are wrong
- B. −5/2
- −5/2 forgets that dividing −5x by −2 gives a positive coefficient.
- C. 2/5
- 2/5 is the reciprocal.
- D. −4
- −4 is the y-intercept.
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