The equation of a line parallel to y-axis and at a distance of 8 units to the right of it, is:

1. x – 8 = 0

2. x + 8 = 0

3. y – 5 = 0

4. y + 5 = 0

Any line parallel to the y-axis is a vertical line and has the equation form x = k.

The distance is 8 units to the right, thus the x-coordinate (k) of every point on the line is +8.

x = 8

x - 8 = 0

Hence, option 1 is the correct option.