Chapter 9.3, Problem 32E

To determine

To derive:

The equations $\left({\displaystyle \sum x}\right)b+\left({{\displaystyle \sum x}}^2\right)m={\displaystyle \sum x}y$ and $nb+\left({\displaystyle \sum x}\right)m={\displaystyle \sum \left(y\right)}$ from the given equation $S\left(m,b\right)={\displaystyle \sum {\left(mx+b-y\right)}^2}$.