$6.$ The data shown below is for six car rental companies in the United States for a recent year. a$.$ Find the equation of the regression line. b$.$ If the number of cars $($in ten$-$thousands$)$ is $40,$ then what is the expected revenue $($in billions$)?$ C$.$ What is the correlation coefficient, and interpret the result? d$.$ Is there a linear relationship? Use a $=0\mathrm{.}05$ and the Table. Cars $($in ten$-$thousands$)63\mathrm{.}029\mathrm{.}020\mathrm{.}819\mathrm{.}113\mathrm{.}48\mathrm{.}5$ KOMPL Revenue $($billions$),$ S $7\mathrm{.}03\mathrm{.}92\mathrm{.}12\mathrm{.}81\mathrm{.}41\mathrm{.}5$ from YOAKEN $($d SHOW WORK. $6.$ The data shown below is for six car rental companies in the United States for a recent year. a$.$ Find the equation of the regression line. b$.$ If the number of cars $($in ten$-$thousands$)$ is $40,$ then what is the expected revenue $($in billions$)?$ c$.$ What is the correlation coefficient, and interpret the result? d$.$ Is there a linear relationship? Use $\backslash$alpha $=0\mathrm{.}05$ and the Table.