Answer: Bottom left corner (southwest corner)
[tex](4, \infty)[/tex]
The left endpoint is x = 4, but we don't include this endpoint because of the open hole. We use a parenthesis to indicate "don't include the endpoint"
The right endpoint is positive infinity. We always use a parenthesis with either infinity since we cannot reach infinity
The interval from 4 to infinity is written as [tex](4, \infty)[/tex] which is like saying [tex]4 < x < \infty[/tex]
