Question

What is the equation of the line that passes through the point left bracket, 8, comma, 4, right bracket(8,4) and has an undefined slope?

Answer 1

A line with an undefined slope is a vertical line. Vertical lines have the form x = a, where 'a' is the x-coordinate of any point on the line. In this case, the line passes through the point (8,4), so the equation of the line is x = 8.