Hello, thank you for taking the time to post your question!
To rewrite this expression in standard form, you want to isolate the squared term of x^2.
In this case that means multiplying both sides of the equation by 12 in order to simplify
y = 1/12 x^2
12y = x^2
The standard form for the given expression is x^2 = 12y
I hope that helps you get moving in a better direction on this type of question! Feel free to reach out if you have any additional questions beyond that :)