The slope of the line is:
[tex]\frac{y_{2}-y_{1}}{x_{2}-x_{1}}[/tex]
[tex]=\frac{-2-7}{8-0}[/tex]
[tex]=\frac{-9}{8}[/tex]
[tex]=-\frac{9}{8}[/tex]
The y-intercept is the value of [tex]y[/tex] when [tex]x=0[/tex], which is 7.
So the equation is
[tex]y=-\frac{9}{8}x+7[/tex]
