Mammalian cell death after exposure to radiation after a dose D of radiation often follows the linear-quadratic model.
Create an XY table. Enter radiation doses into X and percent dead cells into Y. After entering data, click Analyze, choose nonlinear regression, choose the panel of linear-quadratic equations, and choose Linear quadratic: Y is percentage dead.
X: Dose of radiation
Y: Percentage of cells dead
A: Coefficient for linear killing
B: Coefficient for quadratic killing