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The table below represents an exponential function.

\begin{tabular}{|c|c|}
\hline[tex]$x$[/tex] & [tex]$y$[/tex] \\
\hline 0 & 1 \\
\hline 2 & 49 \\
\hline 4 & 2,401 \\
\hline 6 & 117,649 \\
\hline
\end{tabular}

How do the [tex]$y$[/tex]-values in the table grow?

A. The [tex]$y$[/tex]-values increase by a factor of 49 for each [tex]$x$[/tex] increase of 1.
B. The [tex]$y$[/tex]-values increase by 49 for each [tex]$x$[/tex] increase of 1.
C. The [tex]$y$[/tex]-values increase by a factor of 7 for each [tex]$x$[/tex] increase of 1.
D. The [tex]$y$[/tex]-values increase by 7 for each [tex]$x$[/tex] increase of 1.

Sagot :

To determine how the [tex]\( y \)[/tex]-values in the table grow, we need to analyze the given data points and identify the pattern.

The table is:

[tex]\[ \begin{tabular}{|c|c|} \hline $x$ & $y$ \\ \hline 0 & 1 \\ \hline 2 & 49 \\ \hline 4 & 2,401 \\ \hline 6 & 117,649 \\ \hline \end{tabular} \][/tex]

We can calculate the ratios between subsequent [tex]\( y \)[/tex]-values to see if there's a multiplicative factor involved:

1. The ratio between [tex]\( y \)[/tex]-values when [tex]\( x \)[/tex] increases from 0 to 2:
[tex]\[ \frac{y(2)}{y(0)} = \frac{49}{1} = 49 \][/tex]

2. The ratio between [tex]\( y \)[/tex]-values when [tex]\( x \)[/tex] increases from 2 to 4:
[tex]\[ \frac{y(4)}{y(2)} = \frac{2,401}{49} = 49 \][/tex]

3. The ratio between [tex]\( y \)[/tex]-values when [tex]\( x \)[/tex] increases from 4 to 6:
[tex]\[ \frac{y(6)}{y(4)} = \frac{117,649}{2,401} = 49 \][/tex]

From these calculations, we observe that every time [tex]\( x \)[/tex] increases by 2 units, the [tex]\( y \)[/tex]-values increase by a factor of 49.

To understand how the [tex]\( y \)[/tex]-values change for each 1 unit increase in [tex]\( x \)[/tex], we need to recognize that:

[tex]\[ 49 = 7^2 \][/tex]

Since the factor of 49 applies over 2 units of [tex]\( x \)[/tex]:

[tex]\[ 49 = 7^2 \implies y \text{ increases by a factor of 7 for each x increase of 1} \][/tex]

Thus, the correct description of how the [tex]\( y \)[/tex]-values grow for each [tex]\( x \)[/tex] increase of 1 is:

The [tex]\( y \)[/tex]-values increase by a factor of 7 for each [tex]\( x \)[/tex] increase of 1.