What is the slope of the line passing through the points (2,−5) and (4, 1)?

Hope this helps :)

The bottom picture solves it

The answer is water molecules are split.cellular respiration and photosynthesis are complement  reactions to each other. these are reverse reactions. in cellular respiration glucose and oxygen yield water and carbon dioxide. so, when respiration begins,  glucose molecules are split. in the opposite reaction - in photosynthesis, carbon dioxide and water yield glucose and oxygen. thus,  when respiration begins, water molecules are split.

Lexy is correct because angle r is between the incident wave,  n  = 0, and a diffracted wave.