The table below shows the data of the new type of virus disease (COVID-19) for last month in the Türkiye.
i) Find a 2nd order polynomial equation (Ŷ = a0 + a1 x + a2 x2) that fits the number of cases against patients.
ii) Then calculate the correlation coefficient. Using the parabola equation, find a regression curve for the number of patients recovering based on the number of cases.
iii) Also, estimate how many years should it take for the number of cases to end
Extracted text: DATE DAILY CASE NUMBER DAILY HEALING PATIENTS 21-December-20 3,412 34,419 22-December-20 3,309 32,110 23-December-20 3,192 34,492 24-December-20 3,218 33,985 25-December-20 3,199 35,511 26-December-20 3,002 23,231 27-December-20 2,806 21,196 28-December-20 2,816 22,203 29-December-20 2,783 21,004 30-December-20 2,612 20,192 31-December-20 2,219 22,021 1-January-21 1,908 14,110 2-January-21 3-January-21 1,713 11,672 1,515 10,102 4-January-21 1,508 9,896 5-January-21 1,477 8,908 6-January-21 1,458 8,702 7-January-21 1,370 8,211 8-January-21 1,291 9,894 9-January-21 1,103 7,902 10-January-21 1,017 8,103 11-January-21 1,003 10,301 12-January-21 983 10,013 13-January-21 971 9,463 14-January-21 958 9,011 15-January-21 921 9,109 16-January-21 902 8,005 17-January-21 803 8,812 18-January-21 749 7,905 19-January-21 761 7,218 20-January-21 752 5,932 21-January-21 743 6,113