AlgebraMediumValue of y where a line meets the x-axis
Algebra practice question
In the xy-plane, the line 2x + 5y = 6 crosses the x-axis at the point (a, 0). What is the value of a?
Answer: 3
At y = 0, 2x = 6, so x = 3.
Common wrong answers
- If you answered 6
- 6 copies the constant.
- If you answered 1.2
- 1.2 is the y-intercept.
- If you answered -3
- −3 has the sign wrong.
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- Medium
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Line k has equation y = (2/3)x + 1. Which equation represents a line perpendicular to line k?
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