SOLUTION: Why is the line x=4 a vertical line?

Question 255306: Why is the line x=4 a vertical line?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Why is the line x=4 a vertical line?
Plot any two points points that satisfy
the condition.
Example: (4,-3),(4,2)
Draw a line thru the two points.
Notice that the line is vertical.
---
Also, determine the slope of the line.
slope = (2--3)/(4-4) = 5/0 which is undefined
---
Any line which has an undefined slope is vertical.
Any vertical line has an undefined slope.
---
Any equation of the form y = k, where k is some number,
graphs as a vertical line.
=======================================
Cheers,
Stan H.
RELATED QUESTIONS
why is the line x=4 a vertical... (answered by stanbon)

Explain why the line x = 4 is a vertical... (answered by Alan3354,Edwin McCravy,gonzo)

why is the line x=4 a vertical... (answered by Mathtut)

Explain why the line x = 4 is a vertical... (answered by stanbon)

Explain why the line x=4 is a vertical... (answered by LtAurora)

why the line x = 4 is a vertical line. (answered by Alan3354)

Why the line x=4 is a vertical... (answered by Alan3354)

why the line x=4 is a vertical... (answered by nyc_function)

Why is the line x=4 a vertical line? (answered by checkley77,Earlsdon)