Shoe size survey idc if it is the euro size or any other measure

Classify each polynomial by its degree and by its number of terms.

What is the explicit formula for this sequence? -7, -4, -1, 2, a.) an = 8 + (b - 1)3 b.) an = -7 + (n - 1)3 c.) an = 3 + (n -1) (-7) d.) an = -7 + (n - )

8.74 rounded to the nearest whole number