Answer
See below.
Work Step by Step
See image.
Here, A and C are negative.
The effect of $A$ in $y=A\log x$ is to reflect across the x-axis, and then
stretch the graph of $y=\ln x$ in the y direction by factor $|A|.$
The effect of $C$ in $y=A\log x+C$ is to move the graph down by C units.
