Solution:
Given points are:
(4, 3) (4, -2)
Let us first find the slope of line
[tex]m = \frac{y_2-y_1}{x_2-x_1}[/tex]
From given,
[tex](x_1, y_1) = (4, 3)\\\\(x_2, y_2) = (4, -2)[/tex]
Substituting the values we get,
[tex]m = \frac{-2-3}{4-4}[/tex]
slope is undefined
This means that, line is perfectly vertical, and has an infinite (or undefined) slope
Therefore, equation of line is: x = 4
In standard form, we get, x - 4 = 0