Let c be any constant number. Which of the following will always be perpendicular to −3x + y = 2?
A: y=4x+c
B: y=-4+c
C: y=-1/4x+c
D: y=1/4x+c

Question

Let c be any constant number. Which of the following will always be perpendicular to −3x + y = 2?
A: y=4x+c
B: y=-4+c
C: y=-1/4x+c
D: y=1/4x+c

anonymous · Answer

to find if two linear lines are perpendicular you would need to find a the slope of one line =m, then find the slope of another line that is 1/m.

anonymous · Answer

i don't understand how todo that @Chris9k

anonymous · Answer

Do you know y = mx + b?

anonymous · Answer

no.

anonymous · Answer

That is the equation of a line.  all of your answers are in that form.  If you take your first equation.. -3x + y =2 and make it match the others..y = 3x +2   now compare that to y = mx + b....what is m for that equation?

anonymous · Answer

-3x?

anonymous · Answer

the x is already there..just the m...and look at the second equation I made...y = 3x + 2

anonymous · Answer

im confused. :(

anonymous · Answer

Okay..let's start over.

The equation of a line is 

y= mx + b    m is the slope   ok?

anonymous · Answer

okay..

anonymous · Answer

The equation they gave you is

-3x +y = 2

How would you make that y = ?

By adding 3x to both sides.  right?

anonymous · Answer

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