Question 1153447


recall:

In exponential growth functions, the {{{base}}} of the exponent must be greater than {{{1}}}. 

If the {{{base}}} of the exponent were {{{1}}}, the function would remain {{{constant}}}. The graph would be a {{{horizontal}}} line. 

If the {{{base }}}of the exponent were {{{less}}} than {{{1}}}, but {{{greater}}} than {{{0}}}, the function would be {{{decreasing}}}.


Exponential Decay Formula

{{{y = 11761(0.91)^t}}}

in your case  the {{{base }}}of the exponent is {{{0.91}}} which is {{{less}}} than {{{1}}},but greater than {{{0}}}, the function would be {{{decreasing }}}; so, you have {{{exponential}}}{{{ decay}}}


answer: Exponential decay; because the base that is the rate of proportion is less than {{{1}}}.