Answer:
y = x - 1
Step-by-step explanation:
y = x - 1 is the parent function of y = 2(x - 1)2 + 4 before it was moved 4 units, stretched by 2, etc.
This may not be correct, if the problem you asked was formatted wrong, please let me know :)
Have a nice day!
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)
- Heather