Refer to the image below for the graph.
Work Step by Step
The solutions of $x \lt 0$ are all real numbers that are less than $0$. These numbers are graphed on a number line by shading all points to the left of $0$. To graph this inequality, plot a hollow dot (or a hole) at $x=0$. (Alternatively, an parentheses may be used instead of a hollow dot.) Then, shade the numbers to the left of $x=0$. (refer to the attached image in the answer part)