+0  
 
0
47
1
avatar

Using the points (-4, 3) and (2,-7).
Write an equation to the line, then graph the line. 

 

 

 

Using the points (6,7) and (-3, 1)
Write an equation to the line, then graph the line. 

Guest Oct 20, 2017
Sort: 

1+0 Answers

 #1
avatar+78557 
+1

I'll do the first one....you can try the second

 

 (-4, 3) and (2,-7)

 

Find the slope  

 

[ subtract the y coordinates in some order]            [-7 -3]         -10      -5

____________________________________ =   ______  =    __ =   __

[subtract the x coordinates in the same order]       [2 - -4 ]         6        3 

 

Using the slope   and either point - I'll use (2, -7) -  we have

 

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

 

y =  (-5/3) ( x - 2)  -  7  simplify

 

y = (-5/3)x + 10/3  - 7

 

y = (-5/3)x + 10/3 - 21/3

 

y = (-5/3)x - 11/3

 

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

 

 

cool cool cool

CPhill  Oct 20, 2017

19 Online Users

avatar
We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  See details