AlgebraEasyLine with a given slope through the origin
Algebra practice question
Which equation represents a line in the xy-plane with slope 3 that passes through the origin?
- A. y = 3xCorrect
- B. y = x + 3
- C. y = 3
- D. x = 3
Answer: A. y = 3x
y = 3x has slope 3 and gives y = 0 when x = 0.
Why the other answers are wrong
- B. y = x + 3
- y = x + 3 has slope 1 and misses the origin.
- C. y = 3
- y = 3 is horizontal, slope 0.
- D. x = 3
- x = 3 is vertical.
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