Question

What isthe x-coordinate of every point that lies on a vertical line throughP?

Short answer

Thex-coordinate of every point that lies on a vertical line through P is 3.

Step-by-step solution

Step 1. Define coordinate of a point.

Coordinate (x, y) of apoint is an ordered pair of numbers; that is, a number on thex-axis called anx-coordinate, and a number on they-axis called ay-coordinate.

Step 2. Draw the graph.

Draw a vertical line at the given point P.

Step 3. Write x-coordinate of every point that lies on a vertical line through P. 

For any point on the red line the x-coordinate is always 3.

Hence, the x-coordinate of every point that lies on the vertical line through P is 3.