The attributive use of the adjective qualifies the noun, to describe, without any assertion about it. The attributive is an adherent description.
The Position: ὀ πίστος δοῦλος or ὀ δοῦλος ὀ πίστος
Note: the adjective comes immediately after the article.

The predicate use of the adjective makes an assertion about the noun. The predicate is an additional statement.
The Position: ὀ δοῦλος πίστος or πίστος ὀ δοῦλος
Note: The adjective does not come immediately after the article but either precedes the article or follows the noun.

ὁ ἀγαθός “the good man”.

The adjective is in direct relation to the verbal idea.
Determined by whether the adjective is more closely associated with the verb or the noun.
Comparison can be seen in John 10:40 and Mark 4:28.
In John 10:40 the adjective is more intimately associated with the verb “to be” rendering a reading of “The place where John first baptized.”
In Mark 4:28 the adjective is modifying the noun.

Expressed by the positive adjective with a prepositional phrase, followed by ἤ, or followed by μᾶλλον.
Expressed by the comparative adjective followed by ἤ or followed by the ablative.

The majority of the superlatives are used for emphasis in the New Testament, in the sense of very or exceedingly. A comparative may be used for a superlative function. Although rare, it may be used in the normal function of the adjective (1 Corinthians 13:13; 15:9).