Question

What is the midline equation of the function h(x) = -4 cos(5x - 9) - 7?
​

Answer 1

y=-7

Explanation:

Answer 2

Answer: Midline equation: y = -7

Explanation: This function is a sinusoidal function of the form:

y = a.cos(b(x+c))+d

Midline is a horizontal line where the function oscillates above and below.

In the sinusoidal function d represents its vertical shift. Midline is not influenced by any other value except vertical shift. For that reason,

Midline, for the function:
`h(x) = -4cos(5x-9) - 7` is y=d, i.e.,
`y=-7`