find points on graph using the equation -x+2y=11 

how do you find the point for the graph







Just assume values of x then substitute them to the eqution -x + 2y = 11



If x = -1                  if x = 1



    -(-1) + 2y = 11        -(1) + 2y = 11

       1 + 2y = 11           -1 + 2y = 11

           2y = 10                2y = 12

            y = 5                  y = 6



You have two points (-1,5) and (1,6) now so you can now graph the equation.

Plot the two points then connect with a line



Note: you can assume as many as you can though two points can determine 

      the graph of this equation.







    



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Answer by checkley75(3666)   (Show Source): You can put this solution on YOUR website!
 -x+2y=11

2y=x+11

y=x/2+11/2 the y intercept is (0,11/2) or (0,5.5)

setting y=0 we solcve for x thus:

0=x/2+11/2

x/2=-11/2 now cross multiply thus:

2x=-22

x=-22/2

x=-11 or (-11,0) is a second point.

 (graph 300x300 pixels, x from -12 to 12, y from -10 to 10, y = x/2 +11/2).  

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