If a function f(x) is shifted to the left one unit, what function represents the transformation?

f(x+1)
f(x-1)
f(x)+1
f(x) -1

So we want to know what transformation shifts the function f(x) one unit to the left. To know that lets take a look at the argument x. So when we add 1 unti to x it becomes x+1 and it is shifted to the right. When we add -1 to x it becomes x-1 and shifts to the left. So the answer is f(x-1).

The discount is 8.70 . you dont tell us the percent of tax added so there is no way to find out, unless i'm not seeing anything. without tax its 37.70

Ibelieve the answer is b. y=0 would make the line horizontal across the x.