1.the answer
2.you get 100 points.

We need slope
Take any 2 points
Slope:-
[tex]\\ \tt\hookrightarrow m=\dfrac{y_2-y_1}{x_2-x_1}[/tex]
[tex]\\ \tt\hookrightarrow m=\dfrac{6-3}{2-1}[/tex]
[tex]\\ \tt\hookrightarrow m=\dfrac{3}{1}[/tex]
[tex]\\ \tt\hookrightarrow m=3[/tex]