Answer
$y-4=2(x-1)$
Work Step by Step
Solve for the slope using the formula, $m=\frac{y_2-y_1}{y_2-y_1}$ to obtain:
$m=\frac{8-4}{3-1}=\frac{4}{2}=2$
Use the point $(1, 4)$ to write the equation of the line in point-slope form to obtain:
$y-y_1=m(x-x_1)
\\y-4=2(x-1)$.
