HElp plz will mark brainlist

What is the equation of the graph below? y=sec(x)-4

Ineed to know the answer to this algebra question.

Will give let f(x)=2x and g(x)=[tex]2^{x}[/tex] graph the functions on the same coordinate plane. what are the solutions to the equation f(x)=g(x) ? enter your answers in the boxes x=[? ] or x=[? ]