Which of these is an exponential function? $$ y=0.5^{x} \quad y=3 x+5 $$

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Among the given functions:

1. **$$ y = 0.5^{x} $$**  
   - This is an **exponential function** because the variable $$ x $$ is in the exponent. The general form of an exponential function is $$ y = a \cdot b^{x} $$, where $$ b $$ is a positive constant not equal to 1.

2. **$$ y = 3x + 5 $$**  
   - This is a **linear function** because it can be written in the form $$ y = mx + c $$, where $$ m $$ and $$ c $$ are constants.

**Conclusion:**  
$$ y = 0.5^{x} $$ is the exponential function.
$$ y = 0.5^{x} $$ is an exponential function.

Which of these is an exponential function? \( y=0.5^{x} \quad y=3 x+5 \)

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