Solve the following systems of inequalities graphically:
3x+4y≤60,x+3y≤30,x≥0,y≥0
The given inequality is 3x+4y≤60.
Draw the graph of the line 3x +4y =60.
Table of values satisfying the equation
3x +4y =60
x812y96
Putting (0,0) in the given inequation, we have 3×0+4×0≤60⇒0≤60, which is true.
∴ Half plane of 3x+4y≤60 is towards origin.
Also the given inequality is x+3y≤30.
Draw the graph of the line x+3y =30.
Table of values satisfying the equation
x+3y =30
x09y107
Putting (0,0) in the given inequation, we have 0+3×0≤30⇒0≤30, which is true.
∴ Half plane of x+3y≤30 is towars origin.