5
What is the normal form of the line x + y = 1?
7
Find the equation of the line passing through (2, 3) and (4, 7).
8
Find the equation of the line with slope 3 and y-intercept -2.
9
What is the equation of the line with slope -1 and passing through (0, 3)?
10
What is the equation of a family of lines with slope 2?