Question

Describe the graphs of the functions f(x)=2^x -1 and g(x)=-2^x -1

Answer 1

we have an exponential graph

Answer 2

the g(x) is a reflection of the f(x)
I would advise plugging in some values from -2 to 2 on F(x) and g(x)
then graph f(x) with a pencil and g(x) with a pen.