The sequence can be described by the function f(n) = 25 + 20(n - 1), where n represents the number of days since the group started. The domain of the function is the set of all positive integers (n = 1, 2, 3, ...).
An environmental organization started a new online discussion group. The group had 25 members on its first day, and added 20 new members every day after that. The daily membership totals form the increasing sequence shown below.
25, 45, 65, 85, 105, . . .
This sequence can be described by a function.
Use the drop-down menus to correctly complete the following statements.
The sequence can be described by the function _____. The domain of the function is the set of all ______.
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