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What type of line does (y=8) represent?

Answer and explanation

Correct answer: Line parallel to (x)-axis

The direct answer is A: a line parallel to the x-axis. In the equation y=8, the y-coordinate is fixed at 8, while x is free to take any real value. Thus points such as (0,8), (1,8), and (−3,8) all lie on the graph. These points form a horizontal line, and every horizontal line is parallel to the x-axis. A is correct. B is wrong because a line parallel to the y-axis has a fixed x-coordinate, such as x=8, not a fixed y-coordinate. C is wrong because a line through the origin must contain (0,0), but y=8 contains (0,8), not the origin. D is wrong because one equation in this form allows infinitely many points, not only one point. Remember: y=constant gives a horizontal line; x=constant gives a vertical line. The number 8 tells the height, not a single isolated point.

Related tags

Horizontal LineAxisGraphical Method

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