A line perpendicular to the y axis is horizontal line (parallel to the x axis).
Equation of this line is y = a.
The line passes through (3, -8) → x = 3 and y = -8.
Therefore your answer is y = -8.
Step-by-step explanation:
P = 2l + 2w --> w = 1/2·P - l = 1/2·42 - 15 = 6 feet
