Asked by girly girl

The data in the table represents the average number of daylight ours each month in Springfield in 2015, rounded to the nearest quarter-hour.

Jan~9.5 hrs
Feb~10.5 hrs
Mar~12 hrs
Apr~13.25 hrs
May~14.5 hrs
Jun~15 hrs
Jul~14.75 hrs
Aug~13.75 hrs
Sep~12.5 hrs
Oct~11 hrs
Nov~9.75 hrs
Dec~9.25 hrs

Write an equation that best models the data.

What is the expected number of daylight hours in March 2020? Explain.
Answered by girly girl
Does anyone know how to come up with this equation?
Answered by girly girl
Damon can you help me in any way?
Answered by Damon
sine wave with period of one year

a + b sin 2 pi ( m-1)/11

m = 1 for January
m = 12 for December (you might need to adjust that to 1/2 month or something)
Answered by Damon
In march it says 12 hours.
TODAY March 20, the sun crosses the equator and it is 12 dark and 12 light all over this world !
Google spring equinox !!!!!!
Answered by Damon
getting phase and average right
a - b cos(2pi(m-1)/11)
about
12.1 - 2.6 cos [ 2 pi(m-1)/11 ]

using average for a, min at m = 1
Answered by girly girl
Thank you Damon:)
Answered by Damon
You are welcome :)
Answered by No Name
What is the answer? is this answer correct?
Answered by CARISSa
No it’s not
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