# Graphing linear system

• Feb 2nd 2013, 10:00 PM
Yoodle15
Graphing linear system
I have to graph two linear systems and solve them geometrically. However, I am finding that one linear equation in the system contradicts another. Please note that those are two linear systems I have set up myself in the process of solving a 2x2 matrix game, so I'm not sure whether the linear systems I have arrived to themselves are right.

System 1

Objective function
F = x + y = 1/v
Constraints
x, y ≥ 0
1x + 7y ≥ 1
11x + 2y ≥ 1

Now, I first have to draw the boundaries of the constraints on the graph. I find some points of the boundaries and plot it. The boundaries are 1x + 7y = 1 and 11x + 2y = 1.
If x = 2 ("2" is greater than zero)
then 1(2) + 7y = 1, then y = -1/7
and 11(2) + 2y = 1, then y = -10.5
The results I get for "y" on the boundary are systematically negative, while the constraint x, y ≥ 0 require that both x and y are 0 or positive. I am confused. Is there something wrong with the linear systems themselves?
• Feb 2nd 2013, 10:14 PM
ibdutt
Re: Graphing linear system
The region of plane which comprises of solution has been marked. I am sure it will be of helpAttachment 26825
• Feb 3rd 2013, 11:59 AM
Yoodle15
Re: Graphing linear system
Thank you!!! It did help me a lot to solve the problem :] I've managed to solve it. Thanks again!