TREND EQUATION

PRACTICE FOR THE TEST

The following is a table of BMW car sales from $2001$ to $2019$

BMW Car Sales

$5$

BMW Car Sales

$\backslash$table$[[,$Year $($units$)],[2001,6],[2002,7],[2003,9],[2004,10],[2005,12],[2006,15],[2007,19],[2008,24],[2009,30],[2010,35],[2011,40],[2012,47],[2013,50],[2014,55],[2015,62],[2016,68],[2017,75],[2018,80],[2019,86]]$

$6$ questions:

$27$ Calculate sales in $2025$ using the Free Hand's Method

$28$ Calculate sales in $2025$ using the Semi$-$average method

$29$ Calculate sales in $2025$ using the Moving Average method

$30$ Calculate sales in $2025$ using the least squares method

$31$ Change the year equation to quarterly and what will be the sales in January $2025$