Graphs are really useful when it comes to understanding limits in calculus! Here’s how you can use them:

• Approaching Values: Look at what the graph does as it gets close to a certain $x$ value. For example, if the graph gets closer to a specific $y$ value when $x$ gets near $c$, that’s your limit!

• Vertical Asymptotes: These are the places where the graph shoots up or down toward infinity. If you see a vertical asymptote, it might mean that the limit doesn't exist or could be infinite.

• Continuity: If a graph is continuous at a point, it means the limit and the function value are the same there.

Using these ideas can make understanding limits a lot easier and more understandable!