plz help ASAP, giving brainliest!

the first term in an arithmetic sequence is -1. the fourth term in the sequence is -4. the tenth term in the sequence is -10. which function can be used to find the nth term of the arithmetic sequence?
a) f(n) = 1/2(n + 5) + 2
b) f(n) = n + 4
c) f(n) = -3n + 8
d) f(n) = -n