The general equation of line passing through point (x_1,y_1) and (x_2,y_2) is,
[tex]y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)[/tex]Determine the equation of line passing through point (6,-9) and (7,1).
[tex]\begin{gathered} y-(-9)=\frac{1-(-9)}{7-6}(x-6) \\ y+9=\frac{10}{1}(x-6) \\ y=10x-60-9 \\ y=10x-69 \end{gathered}[/tex]So equation of line is y = 10x - 69.