Use finite differences to determine the degree of the polynomial that best describes the data,
7
x
y
-3 -1 1 3 5
-12-7-21-51-93
142

the third differences are constant. a cubic polynomial best describes the data.
the fifth differences are constant. a quintic polynomial best describes the data.
the fourth differences are constant. a quartic polynomial best describes the data.
none of the differences is constant.
d
question 8 (1 point)