Answer: [tex]x \le 4[/tex]
Reason:
There's a closed circle at the endpoint 4, and shading to the left.
This describes all values that are 4 or smaller
So x = 4 or x < 4. In short we say [tex]x \le 4[/tex]
If the endpoint was an open circle, then we'd say x < 4 instead.
