A line where the graph of the function gets closer and closer to a point as one travels along that time.

What fraction of the balls are footballs?

refer to  $\frac{x+3}{x-2}\le0$ : What are the critical numbers?

refer to  $f\left(x\right)=\frac{x+3}{x-2}$ : What is the domain?

Do all exponential functions have the same domain?

In  $f\left(x\right)=a^x$  , what cannot be a value of a?

 $\lbrace(1,2)\ ;\ (2,2)\ ;\ (3,2)\rbrace\ is\ a\ function$