And then if you took that as your input into the square root function, you are going to produce y. So you could just view this as just one big box here, that y is a function of t. But now let's actually answer their question. To tackle it, we just have to apply the chain rule. The chain rule tells us that the derivative of y with respect to t is going to be equal to the derivative of y with respect to x times the derivative of x with respect to t. So let's apply it to this particular situation. We're gonna have the derivative of y with respect to t is equal to the derivative of y with respect to x. Well, what's that? Well, y is equal to the principal root of x.