## Precalculus: Mathematics for Calculus, 7th Edition

We start with the graph of $f_{1}(x)=\log_{10}(x)$ (dashed blue). Since $f(x)=-\log_{10}(x)=-f(x)$ its graph (red) is obtained by reflecting f(x) about the x-axis. Domain of $f$:$\qquad(0,+\infty)$ Range of $f$:$\qquad(-\infty,+\infty)$ Vertical asymptote: $\qquad x=0$