End Behavior: As [tex]$x \rightarrow \infty$[/tex], [tex]$y$[/tex] [tex]$\rightarrow \square$[/tex]

Graph each exponential function. Identify [tex]$a$[/tex], [tex]$b$[/tex], and the [tex]$y$[/tex]-intercept.

1. [tex]$f(x) = 2(2)^x$[/tex]

[tex]\[
\begin{tabular}{|c|c|c|c|c|c|}
\hline
$x$ & -2 & -1 & 0 & 1 & 2 \\
\hline
$f(x)$ & & & & & \\
\hline
\end{tabular}
\][/tex]

[tex]$a = \square$[/tex], [tex]$b = \square$[/tex], [tex]$y$[/tex]-intercept [tex]$= \square$[/tex]

End Behavior: As [tex]$x \rightarrow \infty$[/tex], [tex]$y \rightarrow \square$[/tex]
And as [tex]$x \rightarrow -\infty$[/tex], [tex]$y \rightarrow \square$[/tex]



Answer :

Let's break down the given problem step-by-step:

1. Exponential Function: We're given the exponential function [tex]\( f(x) = 2(2)^x \)[/tex].

2. Calculate [tex]\( f(x) \)[/tex] for Given Values of [tex]\( x \)[/tex]:
- For [tex]\( x = -2 \)[/tex]: [tex]\( f(-2) = 2(2^{-2}) = 2 \cdot \frac{1}{4} = 0.5 \)[/tex]
- For [tex]\( x = -1 \)[/tex]: [tex]\( f(-1) = 2(2^{-1}) = 2 \cdot \frac{1}{2} = 1.0 \)[/tex]
- For [tex]\( x = 0 \)[/tex]: [tex]\( f(0) = 2(2^0) = 2(1) = 2 \)[/tex]
- For [tex]\( x = 1 \)[/tex]: [tex]\( f(1) = 2(2^1) = 2(2) = 4 \)[/tex]
- For [tex]\( x = 2 \)[/tex]: [tex]\( f(2) = 2(2^2) = 2(4) = 8 \)[/tex]

Hence, the values are:
[tex]\[ \begin{tabular}{|c|c|c|c|c|c|} \hline $x$ & -2 & -1 & 0 & 1 & 2 \\ \hline $f(x)$ & 0.5 & 1.0 & 2 & 4 & 8 \\ \hline \end{tabular} \][/tex]

3. Identify Constants [tex]\(a\)[/tex] and [tex]\(b\)[/tex]:
- For the function [tex]\( f(x) = a(b)^x \)[/tex], here we have [tex]\( a = 2 \)[/tex] and [tex]\( b = 2 \)[/tex].

4. Identify the [tex]\(y\)[/tex]-Intercept:
- The [tex]\( y \)[/tex]-intercept occurs where [tex]\( x = 0 \)[/tex].
- For [tex]\( x = 0 \)[/tex], [tex]\( f(0) = 2 \)[/tex], so the [tex]\( y \)[/tex]-intercept is 2.

5. Determine the End Behavior:
- As [tex]\( x \rightarrow \infty \)[/tex]: Since we have an exponential growth function with base [tex]\( b > 1 \)[/tex], [tex]\( y \rightarrow \infty \)[/tex]. So, as [tex]\( x \rightarrow \infty, y \rightarrow \infty \)[/tex].
- As [tex]\( x \rightarrow -\infty \)[/tex]: For negative [tex]\( x \)[/tex] values, [tex]\( 2^x \)[/tex] approaches 0, and thus, [tex]\( y \rightarrow 0 \)[/tex]. So, as [tex]\( x \rightarrow -\infty, y \rightarrow 0 \)[/tex].

Here is the detailed solution summarized:

[tex]\[ \begin{array}{rl} \text{Table of Values:} & \\ \begin{tabular}{|c|c|c|c|c|c|} \hline $x$ & -2 & -1 & 0 & 1 & 2 \\ \hline $f(x)$ & 0.5 & 1.0 & 2 & 4 & 8 \\ \hline \end{tabular} & \\ \\ \text{Constants:} & a = 2, \, b = 2 \\ \text{y-intercept:} & y = 2 \\ \end{array} \][/tex]

End Behavior:
[tex]\[ \text{As } x \rightarrow \infty, y \rightarrow \infty \][/tex]
[tex]\[ \text{As } x \rightarrow -\infty, y \rightarrow 0 \][/tex]

So, filling in the blanks in the original question:

- [tex]\( a = 2 \)[/tex]
- [tex]\( b = 2 \)[/tex]
- [tex]\( y \)[/tex]-Intercept = 2
- As [tex]\( x \rightarrow \infty, y \rightarrow \infty \)[/tex]
- As [tex]\( x \rightarrow -\infty, y \rightarrow 0 \)[/tex]