Tucson Machinery, Incorporated, manufactures numerically controlled machines, which sell for an average price of $$0\mathrm{.}5$ million each. Sales for these NCMs for the past two years were as follows: Use Exhibit $3\mathrm{.}10.$

QUARTER LAST YEAR QUANTITY $($UNITS$)$ QUARTER THIS YEAR QUANTITY $($UNITS$)$

$112116$

$218224$

$326328$

$416418$

Find a line using regression in Excel.

Note: Round your answers to $3$ decimal places.