Which of the following statements about the graph are true?​

Pls! does anybody know a shortcut for answering these types of questions in the future?

Find the amplitude of a sinusoidal function that models this temperature variation

Asunflower was 20 1/2 inches tall. over the next 6 months, it grew to a height of 37 inches tall. what was the average yearly growth rate of the height of the sunflower? ? plz write a proportion to solve i will give you 100 points