How to find if a function is positive or negative?

This is so hard and it’s for a test

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.

Rosa and lisa ade practicing free throws on the basketball court. so far,rosa has made one-and a-half times as many free throws as lisa.what is the unit ratio of rosa's free throws to lisa's free throws?