What is one way the sequence t(n) = 2n + 1 is different than the function f(x) = 2x+1?

This is so hard and it’s for a test

What is the missing statement in step 4? ? rts ? ? vtu and ? rtu ? ? vts ? rts ? ? rvs and ? rtu ? ? stv ? vrs ? ? vru and ? usr ? ? usv ? vur ? ? vus and ? uvs ? ? sru

The functions below show the amount of money bella and sweet t had saved after earning money for doing chores. which description best compares the two functions?