Write a function rule to represent the sequence.
47, 32, 17, 2,...
A(n) = 47 + (n - 1)15
A(n) = 47 + (n - 1)(-13)
A(n) = 47 + (n - 1)(-15)
A(n) = 32 + n - 1)15
Is it -15 or 15 for n? I'm putting in -15 and its not working... but wouldn't that be the right value?