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how do you write an equation for (5,4) and (-4,3)

Guest Jan 16, 2015

Best Answer 

 #9
avatar+93305 
+5

Hfff!    This is you stiring the pot !!!


 


Melody  Jan 17, 2015
 #1
avatar+93305 
+5

what equation?  You have just got two points there.   

Melody  Jan 17, 2015
 #2
avatar+88849 
+5

I think this person wants to write an equation of a line using these points...

OK....let's get the slope, first   ....where the slope, m, is defined as   change in y / change in x

And from the first point to the second, y changes by -1

And from the first point to the second, x changes by - 9

So...the slope is  -1 / -9  = 1/9    ....and we can use one of the points to write the equation...I'll use the first one ...  so we have

y - 4  = (1/9)(x -5)     simplify the right side and add 4 to both sides

y = (1/9)x - 5/9 + 4

y = (1/9)x + 31/9

Here's the graph.....https://www.desmos.com/calculator/azju8icg1f

 

CPhill  Jan 17, 2015
 #3
avatar+93305 
+5

Probably but then again maybe they want the set of all circles that pass through those points or maybe they want something else.  

Melody  Jan 17, 2015
 #4
avatar+88849 
+5

An infinite number of circles pass through any two points - we'd need at least three points to write an equation for any particular circle -  thus, I'll just guess that this was what was intended........but....it's just a guess....

 

CPhill  Jan 17, 2015
 #5
avatar+93305 
+5

Yes I know Chris, I am in a contrary mood.

LET ME HAVE MY MOMENT!       ROF  LOL 

Melody  Jan 17, 2015
 #6
avatar+88849 
+5

Don't get sassy.......

 

CPhill  Jan 17, 2015
 #7
avatar+93305 
+5

Melody  Jan 17, 2015
 #8
avatar+88849 
+5

That looks more like your "sassy" shirt....!!!   LOL!!!

 

CPhill  Jan 17, 2015
 #9
avatar+93305 
+5
Best Answer

Hfff!    This is you stiring the pot !!!


 


Melody  Jan 17, 2015

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