Identify the graph of y=x^2

Really need on these. i have no idea what to do

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with

The function p(x) = –2(x – 9)2 + 100 is used to determine the profit on t-shirts sold for x dollars. what would the profit from sales be if the price of the t-shirts were $15 apiece?