What is the dilation from new to old

anyone? find the second, fifth, and ninth terms of a sequence where the first term is 65 and the common difference is -7. 72, 93, 121 72, 79, 86 58, 37, 9 58, 51, 44

What function has a range {yly< 5}? question on picture above^

Explain how you can show five less than a number using an algebraic expression