$\left[\left[2\,-1\right]\,\left[4\,3\right]\,\left[6\,-7\right]\,\left[7\,5\right]\,\left[9\,-2\right]\right]$

$\left[\left[2\,-1\right]\,\left[4\,3\right]\,\left[6\,-7\right]\,\left[7\,5\right]\,\left[9\,-2\right]\right]$

$a{x}^2\+bx\+c$

$a{x}^2\+bx\+c$

$x$

$x$

${\mathrm{CurveFitting}}_{}\left[\mathrm{LeastSquares}\right]\left(\,\,\mathrm{curve}\=\right)\;$

$-\frac{6315}{5071}\+\frac{5975}{10142}x-\frac{669}{10142}{x}^2$