Answer:
slope = 0
Explanation:
Calculate the slope m using the slope formula
m =
with (x₁, y₁ ) = (5, 9) and (x₂, y₂ ) = (3, 9)
m = = = 0
Since the Y coordinate is constantly 9, it is a horizontal line.
4.5m questions
5.9m answers
= 
= 0