Chapter 1.3, Problem 88E

(a)

To determine

To calculate: The linear demand function for the smartphones and also calculate the sales if the price is raised to $\$385$ and the table representing the sales of smartphones and their selling prices in $2013$ and $2017$ is as follows:

Year	$2013$	$2017$
Selling Price $\left(\$\right)$	$335$	$265$
Sales (millions)	$1,010$	$1,710$

(b)

To determine

To fill: The blanks provided in the statement, “For every ____ increase in price, sales of smartphones decrease by ____ units” and the table representing the sales of smartphones and their selling prices in $2013$ and $2017$ is as follows:

Year	$2013$	$2017$
Selling Price $\left(\$\right)$	$335$	$265$
Sales (millions)	$1,010$	$1,710$