The slope is 1. The picture will show you why.
29 tables of relationships is the answer to your equation above … THANK ME LATER
Answer:
9.3 hours
Step-by-step explanation:
Given

Required
Hours of sunlight on Feb 21, 2013
First, calculate the number of days from Jan 1, 2013 to Feb 21, 2013

So:

So, we have:







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