Which of the following function translates horizontally leftwards?

Question

Which of the following function translates horizontally leftwards?
y = f(x + 2)
y = f(x) - 2
y = f(x) + 2
y = f(x - 2)

Answer 1

The answer is y = f(x+2)

 

f(x+2) = f(x-(-2)). Therefore, this function translates 2 units horizontally to the left, from the parent function.