AlgebraEasyReading the y-intercept from standard form
Algebra practice question
What is the y-coordinate of the point where the graph of 5x − y = 10 crosses the y-axis?
- A. −10Correct
- B. 10
- C. 2
- D. 5
Answer: A. −10
On the y-axis, x = 0: then −y = 10, so y = −10.
Why the other answers are wrong
- B. 10
- Watch the sign: setting x = 0 gives −y = 10, so y = −10.
- C. 2
- 2 is the x-intercept (set y = 0), not the y-intercept.
- D. 5
- 5 is the coefficient of x, not an intercept.
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