Answer:

Step-by-step explanation:
Given

Required
The phase
We have:

Rewrite as:

A cosine function is represented as:

Where:
Phase
By comparison:

Hence, the phase is: 
Answer:
D.Every problem needs an equation in order to be able to solve it
Answer:
the range represents the number of users each month for 24 months
Step-by-step explanation:
this is because the graph shows a 24 month period.
<h2>39/6 = 6.5</h2><h2 /><h2>6 hours 30 minutes</h2>