Question $2$

$3pts$

A regression model between sales $(y$ in $$1000$ s$),$ unit price $(x_1$ in dollars$)$ and television advertisement $(x_2$ in dollars$)$ resulted in the following function:

$Y=7-3x_1+5x_2$

The coefficient of the television advertisement indicates that if the television advertisement is

increased by $$1($holding unit price constant$),$ sales are expected to decrease by $$5000$

decreased by $$1($holding unit price constant$),$ sales are expected to decrease by $$5$

increased by $$1($holding unit price constant$),$ sales are expected to increase by $$5000$

increased by $$1($holding unit price constant$),$ sales are expected to increase by $$5$