The number of points represented by the equation x=5 on the xy-plane is

  1. A. Zero
  2. B. One
  3. C. Two
  4. D. Infinitely many

Correct Answer: D. Infinitely many

Explanation

In the 2D Cartesian plane (xy-plane), the equation x=5 represents a straight line parallel to the y-axis. Since a line is composed of an infinite number of points, it represents infinitely many points.

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