Question

The following figure represents the curve of function y = f(x) , if the equation of the tangent line on any points along it ( x, y) is y = g(x) which of the following sentences is correct :
( g(x) = f(x) , g(x) > or = to f(x) , g(x) < or = to f(x) , f(x) + g(x) < 0) , Explain your answer.