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.
9 answers
Does anyone know how to come up with this equation?
Damon can you help me in any way?
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)
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)
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 !!!!!!
TODAY March 20, the sun crosses the equator and it is 12 dark and 12 light all over this world !
Google spring equinox !!!!!!
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
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
Thank you Damon:)
You are welcome :)
What is the answer? is this answer correct?
No it’s not
1 answer