Write a rule for the sequence.

8, -1, -10, -10...
a. start with 8 and add -9 repeatedly.
b. start with -9 and add 8 repeatedly.
c. start with 8 and add 9 repeatedly.
d. start with 9 and subtract -9 repeatedly.

3 answers

pls help
none of them , notice your 3rd and 4th term are the same

but, looking at the first three:
start with 8 and subtract 9 repeatedly, or a) which is the same thing
sure looks like you keep subtracting 9, right?
If the last term is a typo, and should have been -19 ...