Sales of Volkswagens have grown steadily at auto dealerships in Nevada during the past $5$ years $($see table below$).$

$\backslash$table$[[$Year$,$Sales$],[1,450],[2,495],[3,518],[4,575],[5,590]]$

a$)$ Forecasted sales for year $6$ using the trend projection $($linear regression$)$ method are sales $($round your response to one decimal place$).$