Help me with my math**30 pts** i mark brainiest**

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

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

A(1,1) b(-3,0) c(-4,-1) d(3,-2) drag it to correct position