This is the graph of f(x)=-2 x (1/2)^x. What is the horizontal asymptote of f(x)?

We are given the following function:
[tex]f(x)=-2(\frac{1}{2})^x[/tex]This is a function of the form:
[tex]f(x)=a(b)^x[/tex]For this type of functions the horizontal asymptote is located at:
[tex]y=0[/tex]The graph of the function is: