AlgebraEasyEquation from a slope and an intercept
Algebra practice question
Which equation has a graph in the xy-plane with slope −1 and y-intercept 4?
- A. y = −x + 4Correct
- B. y = x − 4
- C. y = 4x − 1
- D. y = −4x + 1
Answer: A. y = −x + 4
In y = mx + b, m = −1 and b = 4.
Why the other answers are wrong
- B. y = x − 4
- Slope 1 and intercept −4: both signs wrong.
- C. y = 4x − 1
- Slope 4 and intercept −1: swapped.
- D. y = −4x + 1
- Slope −4 and intercept 1: swapped.
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