Mathematics
OpenStudy (anonymous):

what is the formula for finding a quadratic line?

OpenStudy (anonymous):

$AB=\sqrt{(x _{2}-x _{1})^{2}+(y _{2}-y _{1})^{2}}$

OpenStudy (anonymous):

That is the formula to find a distance between 2 points. @ready, could you elaborate what you mean "finding a quadratic line"?