Question

what is the equation of a vertical line passing through the point 3, -5

Answer 1

can you draw a vertical line passing through ( 3 , -5 ) there?

Answer 2

nopee

Answer 3

What do we know about this line?
1) It is vertical [Parallel to y-axis]
2) It passes through 3,-5



When x=a -- > the line is parallel to the y-axis. [where 'a' is a constant]
When y=a -- > the line is parallel to the x-axis. [where 'a' is a constant]

So here as the line is parallel to the y-axis.
x = a = 3
x=3

That mean y can have ANY value but x is ALWAYS 3

So the equation should be
x=3
or
x + 0.y = 3

Understood? :)