As we have not been given the inequalities, but instead a plot, it is hard to give you an answer without talking in terms of an equation.
But I can use two functions to represent the blue and red line:
let blue = f(x)
let red = g(x)
y > f(x) and y > g(x)
or maybe
y >= f(x) and y >= g(x)
does a point (x,y) satisfy this system or prove to be false?