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# PLS

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I don't quite understand the equation for a coordinate plane and slope. I know what the equation is but can someone explain it? THANK YOU

Aug 24, 2017

#1
+100516
+2

I assume you want to write the equation of a line given two points....OK....!!!

Let's assume that the points  are   (1,2)  and  (6,12)

1.  To find the slope, first subtract the y coordinates in any order..... I'll use 12 - 2  = 10

2.  Now....subtract the x coordinates in the SAME order....so we have.....6 - 1  = 5

3. To find the slope....put  (1)  over (2)  =  10 / 5   = 2

Now....using EITHER  of the points.....the equation is

y =  slope ( x - x coordinate of point we choose)  +  y coordinate of the point we choose

So ...using  (1,2) we have

y= 2 ( x - 1) + 2    simplify

y = 2x - 2 + 2

y  = 2x       and that's our line.....!!!

Note that  using  (5,10)  would produce the SAME result

y = 2 ( x - 5) + 10

y = 2x - 10 + 10

y  = 2x  .....   !!!

Hope that helps....!!!

Aug 24, 2017
#2
+314
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OMG THANKS SO MUCH!

ISmellGood  Aug 24, 2017
#3
+100516
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No prob....!!!!

Aug 24, 2017