Chapter 5.6, Problem 1TU

The following fictitious table shows kryptonite price, in dollar per gram, $t$ years after 2006.

$t$= Years since 2006	$0$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$K$= Price	$56$	$51$	$50$	$55$	$58$	$52$	$45$	$43$	$44$	$48$	$51$

Make a quartic model of these data. Round the regression parameters to two decimal places.