Answer:
Option A is correct
The value of k is, 2
Explanation:
Horizontal Shift: If c is a positive real number, then the graph of f(x-c) is the graph of y =f(x) shifted to the right c units.
Given the graph f(x) =2x+4 shifts six units to the right ,i.e,
f(x-6) = 2x+4-6 = 2x -2
Now, it is replaced with the graph f(x) = 2x-k
⇒ 2x-k=2x-2
On comparing both sides we get,
the value of k =2