If the equation of a line is of the formy = ax + b, then a is the slope.

Find the slope of the given line, since parallel lines have the same slope, you have then founda.

To determineb, fill in the given point for x and y, this will give a lineair equation in b which you can solve.

Also possible: the line with slopeathrough the point (p,q) is given by:y-q = a(x-p).