AlgebraEasy–MediumLine sharing a y-intercept
Algebra practice question
Which of the following lines has the same y-intercept as the line 4x + 2y = 10 in the xy-plane?
- A. y = 3x + 5Correct
- B. y = 5x + 4
- C. y = −2x + 10
- D. y = 5x
Answer: A. y = 3x + 5
At x = 0, 2y = 10 gives y = 5, and y = 3x + 5 also has y-intercept 5.
Why the other answers are wrong
- B. y = 5x + 4
- Its y-intercept is 4.
- C. y = −2x + 10
- Its y-intercept is 10; −2 is the given line's slope.
- D. y = 5x
- Its y-intercept is 0.
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