$\backslash$table$[[$Annual Sales, $y,2\mathrm{.}7,3,3\mathrm{.}9,5,5\mathrm{.}5],[$Year$,x,1,2,3,4,5]]$

$($a$)$ Plot the annual sales $(y)$ versus the year $(x).$ Draw a straight line $L$ through the points corresponding to the first and fifth years.

Graph Layers

After you add an object to the graph you can use Graph Layers to view and edit its properties.

$($b$)$ Derive an equation of the line $L.$

$y=$

$($c$)$ Using the equation found in part $($b$),$ estimate the store's annual sales $4$ years from now $)=(9.($Round your answer to one decimal place.$)$ million dollars