Find the minimum value of f(x,y)=y-x+1 for the polygonal convex set determined by this system of inequalities.
X> or = 0 Y> or =0 2x+Y< or =4

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\(f(0,0) = 1\)
\( f(x,y)=y-x+1\)
\(f_x = -1, \, f_y = 1\)
so \(f_{min} = f(2,0) = -1\)

Would that be my answer? @IrishBoy123

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