Question

I need to create a sine graph of the daylight hours for a particular city/year based on a set of data obtained from the US Naval Observatory. I"m not sure how to do this.... I have 12 months worth of data for each day of the month. What data points should I use on my graph, so I can eventually create a formula using the form y=D+A sin [B(t-c)] ? Should I graph each day of every month or just the lows/highs...?

Answer 1

choose portland oregon as your city, and the answer is y = 0