Please help me with math homework vocabulary do not just put random answer down please I really need help zoom in and tap on the photo if you cannot see I will mark brainless

Compare the subtraction problems 6/8 - 5/8 = 1/8 and 6/9 - 7/9 = 1/9 why is the answer to the first problem positive and the answer to the second problem negative

Pepe and leo deposits money into their savings account at the end of the month the table shows the account balances. if there pattern of savings continue and neither earns interest nor withdraw any of the money , how will the balance compare after a very long time ?

How to find the exponential function y=ca^x, with points (1,2) and (2,1)