Question

Which function represents a reflection of f(x) =

Answer 1

If your original equation was $f(x) = 3(2)^x$, then a reflection over the x-axis means you need all the y-values to switch sign.  This means you need to multiply that function by -1.

    $g(x) = -1\cdot 3(2)^x$ or  $g(x) = -3(2)^x$