Answer:
5 units
Step-by-step explanation:
Remember that the minimum distance from a point to a line is always measured along a line that is perpendicular to the given line.
Here that given line is x = 6, a vertical line. The distance from (1, 3) to this line x = 6 is a horizontal one and is 6 - 1, or 5. Drawing this situation will make this even clearer.
