Find the equation of a straight line parallel to y-axis and passing through the point (-3, 5).

We know that the equation of straight line parallel to y-axis is

x = a

Since the line passes through the point (-3, 5), we get

a = -3

∴ Equation of the line ⇒ x = -3 or x + 3 = 0.

Hence, the equation of straight line is x + 3 = 0.