HELP DUE AT 11:59!!!!!

1.Write the arithmetic sequences that would find the nth term.

2.Using the formula you created, what is the 15th term?

if you cant see the numbers on the chart they are.....
N 1 2 3 4 5
f(n) 155 141 127 113 99

HELP DUE AT 1159 1Write the arithmetic sequences that would find the nth term 2Using the formula you created what is the 15th term if you cant see the numbers o class=