AlgebraEasyHorizontal line through a point
Algebra practice question
Which of the following is an equation of the line in the xy-plane that passes through the point (2, 7) and is parallel to the x-axis?
- A. y = 7Correct
- B. x = 2
- C. y = 2x + 7
- D. x = 7
Answer: A. y = 7
A line parallel to the x-axis has a constant y-value, here 7.
Why the other answers are wrong
- B. x = 2
- x = 2 is vertical.
- C. y = 2x + 7
- This line is not horizontal.
- D. x = 7
- x = 7 is vertical and misses the point.
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