How do u write a function for the reflection across the y axis

Make the transformation:

Step-by-step explanation:

If you have a function f(x) and you want to reflect the function f (x) on the y-axis then you must do the following transformation:

Where g(x) is the transformed function

Then the function g(x) will be equal to the function f(x) reflected on the y axis

1/3 + 1/3 ≠ 2/6 because 1/3 alone = 2/6  

step by step explanation:

1/3 + 1/3 = 2/3       2/3=4/6

x = 3 ± √(5+y)