Please answer this math question asap

Ineed i been stuck on this question since yesterday

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

Which question is not a good survey question? a. don't you agree that the financial crisis is essentially over? 63on average, how many hours do you sleep per day? c. what is your opinion of educational funding this year? d. are you happy with the availability of electronic products in your state?