Ai chỉ cách làm cho mk vs ạ

Which of the following is not a subset of {1,2,3}?

Ms. ortiz sells tomatoes wholesale. the function p(x)=-80x^2+320x-10, graphed below, indicates how much profit she makes on a load of tomatoes if she makes on a load of tomatoes if she sells them for 4-x dollars per kilogram. what should ms. ortiz charge per kilogram of tomatoes to make on a load of tomatoes?

The functions f(x) and g(x) are shown in the graph f(x)=x^2 what is g(x) ?