A stretch by a factor of 2 for the exponential growth function f(x)= a(nine-fourths) Superscript x occurs when a =. A stretch by a factor of Eleven-thirds for the exponential decay function f(x)= a(three-fifths) Superscript x occurs when a =. A shrink by a factor of one-third for the exponential growth function f(x)= a(7)x occurs when a =. A shrink by a factor of Two-fifths for the exponential decay function f(x)= a(two-ninths) Superscript x occurs when a =.