Chapter 5.6, Problem 3SBE

Cubic Regression In Exercise S-1 through S-7, use regression to find a cubic model for the given data set. Round the regression parameters to three decimal places. Plot the data along with the cubic model.

$x$	$-1$	$0$	$1$	$2$	$4$	$7$	$8$
$y$	$1$	$4$	$2$	$0$	$5$	$7$	$3$