To get trend-line's equation (polynomial, order 2)
To get trend-line's equation (polynomial, order 2) Question: A simple dataframe that I want to plot it with its trend-line (polynomial, order 2). However I got the equation obviously wrong: y = 1.4x**2 + 6.6x + 0.9 It shall be: y = 0.22×2 – 1.45x + 11.867 # the "2" after x is square How …