Answer :
Express the general equation of the line having two points (x1,y1) and (x2,y2).
[tex]\begin{gathered} y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1) \\ y-1=\frac{9-1}{0--1}(x+1) \\ y-1=\frac{8}{1}(x+1) \\ y=8x+9 \end{gathered}[/tex]The point slope form is y=8x+9
Convert it into standard form implies,
[tex]8x-y=-9[/tex]Therefore, the answer is 8x-y=-9.