Golden Week has promoted the development of tourism economy. The following figure shows the changes of tourism revenue in recent years according to the statistics of the National Tourism Administratio

Golden Week has promoted the development of tourism economy. The following figure shows the changes of tourism revenue in recent years according to the statistics of the National Tourism Administration. ( 1) (1)① The tourism income of the Spring Festival over the years is less than "5? One "and" ten "? (1) Tourism revenue;

(2) The tourism revenue in Golden Week is on the rise.

(2) Let the average annual growth percentage be x, then 300( 1+x) 2 =400,

Solution: x 1 =- 1+ 2 3 3 or x 2 =- 1- 2 3 3,

X=- 1- 2 3 3 (not in line with the meaning of the question, omitted),

∴x=- 1+ 2 3 3 ≈0. 155。

A: The average annual growth rate is 15.5%.