Write down the equation of the line which passes through each of the following pairs of points.

a) [[$ (3, -3) $]] and [[$ (5, -3) $]]

Answer: The equation of the line is [[$ y = $]]

b) [[$ (0, 7) $]] and [[$ (-5, 2) $]]

Answer: The equation of the line is [[$ y = $]]

c) [[$ (-4, -1) $]] and [[$ (3, 2) $]]

Answer: The equation of the line is [[$ y = $]]

d) [[$ (3, 0) $]] and [[$ (3, 9) $]]

Answer: The equation of the line is [[$ x = $]]