Answer:
y = - 8
Explanation:
y = 9 is the equation of a horizontal line parallel to the x- axis
A parallel line will also be a horizontal line with equation
y = c ( where c is the value of the y- coordinate the line passes through )
the line passes through (3, - 8 ) with y- coordinate - 8 , then
y = - 8 ← equation of parallel line