Help please

This is about circle theorems. someone asap : (

The functions f(x) and g(x) are shown in the graph f(x)=x^2 what is g(x) ?

The graph of f(x) is obtained by reflecting the graph of f(x)=-3|x| over the x-axis. which equation describes f(x)? a) f(x)=3|x| b) f(x)=|x+3| c) f(x)=-3|x| d) f(x) = - |x+3|