ensen Tire & Auto is deciding whether to purchase a maintenance contract for its new computer wheel alignment and balancing machine. Managers feel that maintenance expense should be related to usage, and they collected the following information on weekly usage $($hours$)$ and annual maintenance expense $($in hundreds of dollars$).$

Weekly Usage

$($hours$)$ Annual

Maintenance

Expense

$1317\mathrm{.}0$

$1022\mathrm{.}0$

$2030\mathrm{.}0$

$2837\mathrm{.}0$

$3247\mathrm{.}0$

$1730\mathrm{.}5$

$2432\mathrm{.}5$

$3139\mathrm{.}0$

$4051\mathrm{.}5$

$3840\mathrm{.}0$