AlgebraEasy–MediumWhere a line crosses the y-axis
Algebra practice question
In the xy-plane, the graph of y = −2x + 5 crosses the y-axis at which point?
- A. (0, 5)Correct
- B. (5, 0)
- C. (0, −2)
- D. (2.5, 0)
Answer: A. (0, 5)
On the y-axis, x = 0, so y = −2(0) + 5 = 5. The point is (0, 5).
Why the other answers are wrong
- B. (5, 0)
- (5, 0) has y = 0, which is on the x-axis, and it isn't on the line (−10 + 5 ≠ 0).
- C. (0, −2)
- −2 is the slope, not the y-intercept.
- D. (2.5, 0)
- (2.5, 0) is where the line crosses the x-axis.
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