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graph the linear system by completing a table  -x+2/9y=1 9x+3y=6

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lflint29 | Student, College Freshman | eNoter

Posted July 2, 2013 at 11:00 PM via web

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graph the linear system by completing a table 

-x+2/9y=1

9x+3y=6

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justaguide | College Teacher | (Level 2) Distinguished Educator

Posted July 3, 2013 at 1:17 AM (Answer #1)

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The linear system consists of the following equations

-x + (2/9)y = 1 ...(1)

9x + 3y = 6 ...(2)

-x + (2/9)y = 1 => y = (9/2)*(1+x)

9x + 3y = 6 => y = (6 - 9x)/3

The table:

x   y for (1)   y for (2)

1       9             -1

2        13.5        -4

Now plot the equation by a line through the points (1, 9) and (2, 13.5) and plot the second graph by a line through the points (1, -1) and (2, -4). The point of intersection of the two is the solution of the linear system.

The solution of the system is (-1/3, 3)

 

 

 

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