Question 1106685
<br>
An exponential function is of the form {{{y = a(b^x)}}}.<br>
From the given information, we know
{{{5 = a(b^0)}}}
{{{5 = a}}}<br>
Using that value of a with the other piece of information,
{{{40 = a(b^3)}}}
{{{40 = 5b^3}}}
{{{8 = b^3}}}
{{{2 = b}}}<br>
Both parameters for the exponential function have been determined.  The function is
{{{y = 5(2^x)}}}