Please someone help I forgot everything at this moment!!! It’s easy just forgot :/

How to determine whether two known pairs of points are on the same line.

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

A) if $50000 is invested in a bank account that pays 9.3% of interest compounded on a six-monthly basis, how much money will be in the account after 3 and 12 years? b) if matusalen's father had put $2.0 in the bank when he was born and there, how long would matusalen have had to his death (969 years later) if the interest was 7% per year composed each month and weekly?