Precalculus Examples

$(1, 9)$

Step 1

To find an exponential function, $f (x) = a^{x}$ , containing the point, set $f (x)$ in the function to the $y$ value $9$ of the point, and set $x$ to the $x$ value $1$ of the point.

$9 = a$

Step 2

Solve the equation for $a$ .

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Step 2.1

Rewrite the equation as $a^{1} = 9$ .

$a = 9$

Step 2.2

Simplify.

$a = 9$

Step 3

Substitute each value for $a$ back into the function $f (x) = a^{x}$ to find each possible exponential function.

$f (x) = {(9)}^{x}$