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Mathematics 13 Online
OpenStudy (pixiedust1):

-

OpenStudy (pixiedust1):

@Directrix

OpenStudy (nincompoop):

nope

OpenStudy (nincompoop):

the equation of a line in the y-intercept form y=mx+b the value of your m is your slope.

OpenStudy (pixiedust1):

Okay, so then y=-2x+4

OpenStudy (pixiedust1):

and m=slope so slope =-2

OpenStudy (nincompoop):

that is not what your question indicates earlier you had y= 2x + 4 if you changed it to y = -2x + 4 the slope changes from 2 to -2

OpenStudy (pixiedust1):

Yeah, I've changed my mind :D

OpenStudy (pixiedust1):

I've chosen a different answer

OpenStudy (pixiedust1):

Still the same question though. I just changed my answer from -1/2 to -2

OpenStudy (nincompoop):

nope

OpenStudy (nincompoop):

-1/2, -2 and 2 are completely different values

OpenStudy (pixiedust1):

Okay, so I got it wrong. So the answer is -2?

OpenStudy (nincompoop):

a negative slope goes downward from left to right looking like this symbol \ a positive slope goes upward from left to right looking like this symbol / and the value itself will determine how steep or flat a slope is

OpenStudy (pixiedust1):

Oh okay!

OpenStudy (nincompoop):

let us say I have an equation y = 4x + 5 my slope would be 4 if I had an equation y = -5x + 3/2 then my slope is -5

OpenStudy (pixiedust1):

That makes sense

OpenStudy (nincompoop):

you see the pattern here?

OpenStudy (pixiedust1):

Whatever is the m, is the slope

OpenStudy (nincompoop):

the format of the equation itself is designed for you to identify the slope itself- the m value, and the y-intercept value, which b

OpenStudy (pixiedust1):

But my equation is not in slope intercept form.

OpenStudy (pixiedust1):

Wait, we gotta find the line that's perpendicular!

OpenStudy (nincompoop):

so if you are given 2x + 3y = 4 convert this first into the y-intercept format by solving for y -2x + 2x + 3y = 4 - 2x becomes 3y = -2x + 4 divide both sides my 3 y = -2x/3 + 4/3 so your slope is -2/3

OpenStudy (nincompoop):

perpendicular to what? remember that perpendicular line would involve 2 lines that makes a 90 degree angle from any reference point

OpenStudy (pixiedust1):

So then slope=-2 -2*-1=2 Then -2 is perpendicular to the answer, 2

OpenStudy (pixiedust1):

Oops! I mean -2*1/2=-1 Then perpendicular is 1/2

OpenStudy (nincompoop):

if you are to look for a line "perpendicular" to another line you obtain the negative reciprocal of the original line

OpenStudy (nincompoop):

if you have -3 as your original slope, a perpendicular line would be solved like this: negative reciprocal - (-1/3) = 1/3

OpenStudy (pixiedust1):

Okay, I'm more confused then when I started. 1/3 isn't an answer option. thanks anyways, and have a great day.

OpenStudy (nincompoop):

because I am providing a different example from what you are given

OpenStudy (nincompoop):

if I kept telling you the answer, you would just rely on my answers and not think anymore I am giving you a different problem of the same concept so that you think for yourself and see if you truly understand

OpenStudy (pixiedust1):

Oh this is a different problem?

OpenStudy (nincompoop):

I usually provide a different problem to explain a concept to someone

OpenStudy (pixiedust1):

Don't worry. I'm not "getting" the answers from anybody. I did my work myself, so I did give it all my best shot, and I did put effort into it. I just needed someone to check it. Thanks for being through though. :D

OpenStudy (pixiedust1):

Have a blessed day! :D

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