During Mother's Day, some members of a school participated in social welfare activities and prepared to buy a batch of wishing bottles for sale, and the profits were donated to charity. According to market research, the corresponding relationship between the sales volume y (a) and the sales unit price x (a) of the wishing bottle in a period of time is as follows:

1 try to judge the functional relationship between y and x and find the functional relationship;

2 If the purchase price of the wishing bottle is 6 yuan/bottle, according to the sales law of the above market survey, find the functional relationship between the sales profit W (yuan) and the sales unit price X (yuan);

Under the current conditions, if the purchase cost of the wishing bottle does not exceed that of 900 yuan, in order to get the maximum profit, try to determine the sales unit price of the wishing bottle and find out the maximum profit at this time.

The original question is exactly the same, dear. The solution process is as above. The address on the horizontal line in the upper left corner is a good place for students to study. I think it's quite useful. I hope it helps you, too. Come on ~ you can try another question. If it helps, I hope to adopt it!