Question

Find the equation of the line with Slope = −8-8 and passing through (−9,68)(-9,68) . Write your equation in the form y=mx+by=mx+b .

Answer 1

Let:

`\begin{gathered} (x1,y1)=(-9,68) \\ m=-8 \end{gathered}`

Using the point-slope equation:

`\begin{gathered} y-y1=m(x-x1) \\ y-68=-8(x-(-9)) \\ y-68=-8(x+9) \end{gathered}`

Solve for y:

`\begin{gathered} y-68=-8x-72 \\ y=-8x-72+68 \\ y=-8x-4 \end{gathered}`