Question

answer attempt 1 out of 2 the midline is y = 57 and it represents hours degrees fahrenheit

Explanation:

Step1: Calculate midline value

The midline of a periodic function is the average of its maximum and minimum values. Here, max = 67, min = 47.
$\text{Midline} = \frac{67 + 47}{2} = 57$

Step2: Identify units

The midline is a temperature value, so its units match the y-axis.

Answer:

The midline is $y = 57$ degrees Fahrenheit and it represents the average temperature over the period.