Question

Which graph represents a reflection of f(x) = 1/3(9)^x across the x-axis?

Answer 1

The reflection of $f(x)=1/3(9)^x$ across the x-axis is equivalent to multiplying the entire function by -1 because reflecting across the x-axis changes the sign of y-coordinates. Therefore, the graph of $g(x)=-1/3(9)^x$ represents the reflection of $f(x)$ across the x-axis.