Question

Please view screenshot down below

Answer 1

Given two points

$(x_1,y_1),\quad (x_2,y_2)$

The slope of the line passing through both is

$m=\dfrac{\Delta y}{\Delta x}=\dfrac{y_2-y_1}{x_2-x_1}$

Plugging your values, we have

$m=\dfrac{7-3}{8-1}=\dfrac{4}{7}$