Write the equation of the line which passes through (2, 1) and is perpendicular to x = –2??

Question

lgbasallote · Answer

hint!! |dw:1341017987796:dw|
does that help?

anonymous · Answer

yah, kinda. It would help if I seen work. srry.

lgbasallote · Answer

hmm okay let me present another hint...the perpendicular line would be a horizontal line correct?

anonymous · Answer

uh-huh.

anonymous · Answer

the formula for this is y=mx+b?

lgbasallote · Answer

actually...you cant use y= mx + b here because there is no y in x = 2

there can be a formula here but it's complicated to explain so im trying it graphically

lgbasallote · Answer

would you like to hear the formula though?

anonymous · Answer

okay

anonymous · Answer

yah.

lgbasallote · Answer

okay...so the line is x = 2

as i showed you..the line is vertical.

it is a rule in this thing that if the graph is vertical then it has 0 slope

if it is horizontal then undefined slope

do you get that?

anonymous · Answer

yah, but dnt u mean -2?

lgbasallote · Answer

why would you think it's -2?

anonymous · Answer

you u mean the (2,1) <--that's in here, that's -2?

lgbasallote · Answer

no..im talking about the line x = 2...the one it's saying the line is perpendicular to?

anonymous · Answer

oh, okay.

agent47 · Answer

y=1

agent47 · Answer

x=-2 has a vertical slope
so you need a horizontal slope, or slope 0

lgbasallote · Answer

i made a mistake in my earlier comment

slope of vertical is undefined then slope of horizontal is 0

agent47 · Answer

y-y1=0(x-x1)
y-1=0
y=1

anonymous · Answer

thank you! 2 the both of u :)