Answer
Please see the image.
approximately 4900 establishments in 2015
Work Step by Step
$y=-80.7*x+167509$ is the trendline
Let $x=2015$
$y=-80.7*x+167509$
$y=-80.7*2015+167509$
$y=-162610.5+167509$
$y=4898.5$
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