Answer
Interval Notation: (-infinity, -3)
Number Line: Open circle on negative -3, line on the left side of the number line
Work Step by Step
Because x < -3,
-3 is not included in the number line.
Therefore, the solution will include all values that are to the left of -3 on the number line, excluding -3.
The interval notation uses open brackets because -3 and -infinity are not included.