Linked Question.

[ProfessorM@ss]

If a power that has the Limitation Linked has a predefined level where the power activates, does it activate at the lower levels of the power?

Let me give a specific example: Our giant-size hero, Titan, can 60 pts. of Growth. He buys a Damage Reduction linked to his Growth.

Does he get 25% nonresistant damage reduction when he's grown 10 points worth? Does it turn resistant at 15 points, and so forth, until he manifests his full 75% resistant damage reduction at his full size?

--->M@ss

[Steve Long]

As noted in the rulebook on 5E 196, Linked powers must be used proportionately. In cases where the proportionality might not be obvious, or where the lesser power is a flat-rate power that can't be "divided" into increments easily, it's up to the GM to determine how this works.