PLLLLLZ HELP I HAVE A DEADLINE Write a recursive formula for finding the nth term of each arithmetic sequence. 15.75, 14.25, 12.75, …

a1 = 15.75, an = an – 1 + 1.5

a1 = 12.75, an = an – 1 – 1.5

a1 = 11.25, an = an – 1 + 1.5

a1 = 15.75, an = an – 1 – 1.5