PLS HELP 20 POINTS How are key features of exponential functions determined and interpreted from a graph and table?

The speed of a falling object increases at a constant rate as time increases since the object was dropped. which graph could represent the relationship betweent time in seconds, and s, speed in meters per second? speed of a falling object object over time

What is the missing reason in step 5? linear pair postulategivendefinition of complementary anglescongruent complements theorem

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)