Understanding domain and range can be tough for students who are looking at functions. Here are some common problems they face:

• Finding Limits: Students often have a hard time figuring out where the function starts and ends.

• Hard Functions: For functions that aren’t straight lines, it can be confusing to figure out the range.

To help with these challenges, using graphing tools can really help. These tools show how the function looks, making it easier to see how $f(x)$ behaves and what its limits are.