Here's an algebra question I need help with... (I'm not sure if I selected the right answer)

Wich statement could be used to explain why the function h(x)= x^3 has an inverse relation that is also a function

Solve for x and select the correct answer

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