Question 1 (1 point) In an arithmetic sequence, which of these represents the seventy-fifth term? a(75) O 75a None of these. a75 O a75Which graph represents the following arithmetic sequence equation: tn = 3n - 7 O 60 40 20 2 30 20 10Question 3 (1 point) Which of the following IS NOT an arithmetic series? (f ":1. 2117139... (f a} 29231814 2216104 .f These are all arithmetic series. .5 "3. 3827165 Question 4 (1 point) Find the sum of the first 15 terms of the following arithmetic series. 44+41+38+35+... 345 975 345 975