Answer
$y - q = \frac{a}{b}(x - p)$
Work Step by Step
We are given the point $(p, q)$ and the slope $m = \frac{a}{b}$.
We can plug these values into the point-slope equation, which is given by the formula:
$y - y_1 = m(x - x_1)$,
where $m$ is the slope and $(x_1, y_1)$ is a point on the line.
Let's plug in the points and slope into the formula:
$y - q = \frac{a}{b}(x - p)$