+0  
 
0
288
4
avatar+2448 

I dont get this

 Nov 27, 2018
 #1
avatar+107405 
+2

OK, RP....you have already done this without realizing it...

 

Slope of given line = -4        point ( 1, -2)

 

y = slope ( x - x coordinate) + y coordinate

 

y = -4 ( x - 1) + (-2)

 

y = -4x + 4 - 2

 

y = -4x + 2

 

 

cool cool cool

 Nov 27, 2018
 #3
avatar+2448 
+1

thank youuu

RainbowPanda  Nov 27, 2018
 #4
avatar+107405 
+1

And thanks to EP, too !!!

 

 

cool cool cool

CPhill  Nov 27, 2018
 #2
avatar+20239 
0

Let's write the equation we are looking for as

 

y= mx + b       the slope of the original equation is  -4

y=-4x + b        Substitute in the point 1,-2 to calc 'b'

-2 = -4(1) + b

2=b

 

so     y = -4x + 2

 Nov 27, 2018

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