Answer:
x = 6
Step-by-step explanation:
y = 7 is a horizontal line parallel to the x- axis.
Thus a perpendicular is a vertical line parallel to the y- axis with equation
x = c
where c is the value of the x- coordinates the line passes through.
The line passes through (6, 1 ) with x- coordinate 6 , thus
x = 6 ← equation of perpendicular line
