Question

What is the equation of the midline of the sinusoidal function?

Answer 1

y={2+6}/{2} = 4

is the answer for your problem

Answer 2

First of all, the midline is a horizontal line. As such, it will have an equation like
`y=k`, and we have to find the correct value for
`k`.

To find it, we have to take the average of the y-coordinates of the min and max points.

Since the maximum is 6 and the minimum is 2, the average is

`(2+6)/(2) = 4`