Let’s analyze the equations to determine whether they represent exponential growth or decay.

1. $y = 237e^{0.143t}$:

   • The exponent $0.143t$ has a positive coefficient (0.143), so the function represents exponential growth.

2. $y = 173 \cdot 1.92^t$:

   • The base $1.92 > 1$, indicating the function represents exponential growth.

3. $y = 247 \cdot (1.5)^t$:

   • The base $1.5 > 1$, so this function also represents exponential growth.

4. $y = 97e^{-1.58t}$:

   • The exponent $-1.58t$ has a negative coefficient (-1.58), so this function represents exponential decay.

Would you like further clarification or details? Here are some related questions to consider:

1. What is the general formula for exponential growth and decay?
2. How do you determine the growth or decay factor in a function?
3. Can a base between 0 and 1 represent exponential growth?
4. What real-world examples can model exponential growth or decay?
5. How does changing the coefficient in front of the exponential term affect the graph of the function?

Tip: Always check the sign of the exponent or the value of the base to identify growth or decay.