Chapter 1.8, Problem 5E

In Exercise 1-6, find the interpolating polynomial foe the given table of data. [Hint: If the data table has $k$ entries, the interpolating polynomial will be of degree $k-1$ or less.]

$\mathit{t}$	$-1$	$0$	$1$	$2$
$\mathit{y}$	$-6$	$1$	$4$	$15$