+0  
 
0
170
2
avatar+62 

#3     X  |  Y

         6     -1

         4      0

         2      1

 

can somebody please tell me the equation for this table? (Sorry it isn’t an actual picture, it wouldn’t let me upload my picture.)

Hamiltrash  Jan 1, 2018
 #1
avatar+87621 
+2

Notice that  as y  changes by  +1,  x changes  by   -2

 

So....this is a linear equation  where the slope, m,   = 

 

change in y  / change in  x   =     

 

 +1  / -2    =    -1/2

 

So.....using   y  =   m  ( x  -  x1)  +  y1         where  (x1, y1)  is any point on the graph, we have

 

y  =  (-1/2) ( x - 4)   +  0      simplify

 

y  =  (-1/2)x  +  2

 

 

cool cool cool

CPhill  Jan 1, 2018
 #2
avatar+62 
+1

Thank you !!!

Hamiltrash  Jan 2, 2018

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