To determine the rule for generating the next term in the sequence \(23, 19.5, 16, 12.5, \ldots\), we need to identify how each term relates to the previous term.
- From \(23\) to \(19.5\): \[ 23 - 19.5 = 3.5 \] \[ 19.5 - 16 = 3.5 \] \[ 16 - 12.5 = 3.5 \]
As we can see, each term is derived by subtracting \(3.5\) from the previous term.
Therefore, the correct description of the rule for generating the next term is:
Add the common difference of \(-3.5\).
So, the correct response is: Add the common difference of negative 3.5.