# How do you write the point slope form of the equation given m=-9 and (8,9)?

The point-slope formula states: $\left(y - \textcolor{red}{{y}_{1}}\right) = \textcolor{b l u e}{m} \left(x - \textcolor{red}{{x}_{1}}\right)$
Where $\textcolor{b l u e}{m}$ is the slope and $\textcolor{red}{\left(\left({x}_{1} , {y}_{1}\right)\right)}$ is a point the line passes through. Substituting the values from the problem gives:
$\left(y - \textcolor{red}{9}\right) = \textcolor{b l u e}{- 9} \left(x - \textcolor{red}{8}\right)$