Answer
Please see below.
Work Step by Step
The graph of $g(x)=- \log x$ (the red graph) is the graph of $f(x)=\log x$ (the blue graph) reflected about the $x$-axis.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.