dont know what to do need help?!?!?!?!?!
Select the equation of the line that passes through the point (3, 5) and is perpendicular to the line x = 4.

y = 5
x = 5
y = 4
x = 3

Question

dont know what to do need help?!?!?!?!?!
Select the equation of the line that passes through the point (3, 5) and is perpendicular to the line x = 4.

 y = 5
 x = 5
 y = 4
 x = 3

anonymous · Answer

@texaschic101 can u plz help

anonymous · Answer

ill give a medal and fan

anonymous · Answer

@e.mccormick ill give u medal if u can plz help me

anonymous · Answer

@OM14forever

anonymous · Answer

@Nnesha Can you help?

e.mccormick · Answer

OK, so, the line X=4 has what slope?

anonymous · Answer

-4?

e.mccormick · Answer

No.

When a line is defined by x=k, then for any y, the x value is k:

|dw:1440609795470:dw|

This means it is straight up and down.

e.mccormick · Answer

So, if it is straight up and down, what is perpendicular to it and passes through (3,5)?

anonymous · Answer

so the slope is undefined and the one that goes through it would have no slope?

e.mccormick · Answer

Yes.  And what has no slope, or is horozontal, and goes through (3,5)?

anonymous · Answer

idk? it would have to have an opposite slope right?

e.mccormick · Answer

Well, they sort of do.... it is basically infinite slope for up and down, and the negative invers of infinite slope basically goes to zero... but it would take advanced calculus to discuss how that could work.

What I would use is the simpler version of perpendicular.  They meet at right angles.  So one is a vertiaacal line and one is a horozontal line.  If you know that it is a horozontal line, then the only question is which horozontal line passes through the given point?

anonymous · Answer

|dw:1440610571680:dw|

e.mccormick · Answer

Exactly.  So what is the equation of that line?

anonymous · Answer

wait i think i got it is the answer y=5

e.mccormick · Answer

YES!  There it is.

anonymous · Answer

thnks ur a life saver : )