Answer:
- all real numbers
- all real numbers
- 3 places where f(x)=4
- f(1) = 4
Step-by-step explanation:
The domain is the horizontal extent of the graph. This graph has no horizontal gaps, and arrows on each end of the lines for large and small x. It is defined for all real numbers.
The range is the vertical extent of the graph. There are vertical gaps at some points (x=-4, x=1), but those gaps are filled by the function being defined elsewhere. The function is able to take on the values of all real numbers.
A line at y=4 crosses the graph 3 times. There are 3 values such that f(x)=4.
The graph shows f(1) = 4. The open circle at (1, -2) shows the function is not defined to be the value -2 at x=1.
