A vertical line has a constant x-value for all points on the line. To find the equation of a vertical line that passes through the point (3, 5), we simply take the x-coordinate of the point.
In this case, the x-coordinate is 3. Therefore, the equation of the vertical line can be expressed as:
x = 3
This indicates that no matter what the y-value is, the x-value will always be 3 for the points located on this line.