What is the slope of a line that passes through the point (−1, 1) and is parallel to a line that passes through (3, 6) and (1, −2)?
Parallel lines have the same slope, so we have to find the slope of the line joining the given points first.
The slope of the line parallel to this line is also 4.
We now know the slope and one point of the new line.
It's equation can be found using the formula