How do you write an equation in standard form for a line which passes through points (-9,0), m= -9?

Answer: The equation in standard form is $- 9 x - y - 81 = 0$
Explanation: The equation in slope intercept form is $m x + b = y$.
$m = - 9$ $\implies$ $- 9 x + b = y$
From the coordinates of the point $\left(- 9 , 0\right)$ we get $\left(- 9\right) \cdot \left(- 9\right) + b = 0$ $\implies$ $b = - 81$
So, we have the equation $- 9 x - 81 = y$, which gives us the following equation in standard form: $- 9 x - y - 81 = 0$