Answer:
y = - 3
Explanation:
the midline is a horizontal line positioned midway between the maximum and minimum values of the graph.
maximum = - 1 and minimum = - 5
then
(- 1 + (- 5)) ÷ 2 = (- 1 - 5) ÷ 2 = - 6 ÷ 2 = - 3 so equation of midline is
y = - 3