Question 1097073
{{{f(x)=ab^x}}}
{{{f(0)=ab^0=8}}}
{{{a=8}}}
,
,
{{{f(1)=8b^(1)=1.6}}}
{{{8b=1.6}}}
{{{b=1.6/8}}}
{{{b=1/5}}}

So then,
{{{f(x)=8/5^x}}}