Need help on question #1 and #2

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

Which of the following is true for the relation f(x)=2x^2+1

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 plzzz write a proportion i will give you 100 points