COVID-19 in 2020~ Extending using approximating polynomials for Ro

We extend our range for estimating Ro using another polynomial. We have already investigated if r^3 (r cubed) is a good estimate for Ro for COVID-19: COVID-19~ World-wide estimates. Is r^3 a good estimate for Ro? We have already looked at worldwide estimates for Ro if Ro ~ exp(2.5r – 2.5), where r is a…