LOOKUP and Filter Based on Combined Condition

Hi,

I'm facing following issues in attached sheets. could any one help.

there is some error in these sheet. i couldnt able correct it. raw data has data of 1st nov to 5th nov. following things need to be correct

1. when i enter date in A2, same Lin. reg.equation is coming in b3, b4, b5, b6 . this need to correct. that is b3, b4, b5, b6 should has equation of 2nd nov, 3rd nov, 4th nov, 5th nov.
2. lin.reg day 2, Lin reg day 3, Lin reg day 4, Lin reg day 5 is not filtering data when i enter respective date(2-nov-19, 3-nov-19, 4-nov-19, 5-nov-19) in a3, a4, a5, a6.

Thanks for support