The table shows the number of internet users worldwide since $1994.$

$($A$)$ Let $x$ represent the number of years since $1994$ and find an exponential regression model $)=(a{b}^x$ for this data set.

$($B$)$ Use the model to estimate the number of hosts in $2027($to the nearest million$).$

$\backslash$table$[[\backslash$table$[[$Internet Users $($millions$)],[$Year$]],],[1994,2\mathrm{.}3],[1997,15\mathrm{.}4],[2000,71\mathrm{.}8],[2003,186\mathrm{.}0],[2006,405\mathrm{.}0],[2009,619\mathrm{.}8],[2012,821\mathrm{.}7]]$

$($A$)$ Write the regression equation $y=a{b}^x.$

$y=$

$($Round to four decimal places as needed.$)$

$($B$)$ The estimated number of hosts in $2027$ is million.