Final answer:
The explicit rule for the given sequence is to add 3.5 to each previous term.
Step-by-step explanation:
The given sequence is:
10.5, 14, 17.5, 21, 24.5, ...
The explicit rule for this sequence is that each term is obtained by adding 3.5 to the previous term. So, the nth term of the sequence can be represented by the formula:
Tn = Tn-1 + 3.5
where Tn is the nth term of the sequence and Tn-1 is the previous term.