What can you say about the y-values of the two functions

The jewelry store is having a sale. necklaces that were regularly priced at $23.50 are on sale for $18.80. what is the percentage of decrease in the price of necklaces?

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)

Wich statement could be used to explain why the function h(x)= x^3 has an inverse relation that is also a function