Here’s a conceptual question about exponential functions suitable for a precalculus student:

Question: Explain why the graph of an exponential function of the form $f(x) = a \cdot b^x$ (where $a > 0$ and $b > 1$) never touches the x-axis. What does this imply about the values of the function as $x \to -\infty$ and $x \to \infty$?

This question tests the student’s understanding of the behavior of exponential growth, asymptotes, and limits.

Do you want further clarification on this concept or have any specific questions about exponential functions?

Here are 5 related questions:

1. What happens to the graph of $f(x) = a \cdot b^x$ when $0 < b < 1$?
2. How does changing the value of $a$ affect the graph of an exponential function?
3. Can an exponential function ever have a horizontal asymptote that is not the x-axis? Why or why not?
4. How do exponential functions differ from linear functions in terms of growth rate?
5. How can you solve for $x$ in an equation like $a \cdot b^x = c$?

Tip: Always look for horizontal asymptotes when analyzing the end behavior of exponential functions!