Observe the table:
\The ordered pair are
.
Find the first differences of
-values in the ordered pair.




Since the first differences are not all equal .
\Hence the table of values does not represent a linear function.
\Find the second differences of
-values in the ordered pair.



Since, the second differences are not all equal,
\Hence the table of values does not represent a quadratic function.
\Find the Ratios of the
-values in the ordered pair and compare.




The ratios of successive
-values are equal.
Therefore, the table of values can be modeled by an exponential function.
\Write an equation for the function.
\The equation is in the form of
.
The constant ratio is
.
Therefore the exponential equation is
.
Find the value of
.
Let the ordered pair is
.
(Exponential equation)
(Substitute
in the equation)
(Multiply)
(Divide each sude by
)
(Cancel common terms)
Write an equation.
\
(Substitute
in the eqation)
An equation that models the data is
.
The table of values represents an exponential function
.