Final answer:
The function y = x^2 is increasing for x > 0, decreasing for x < 0, and constant at x = 0.
Step-by-step explanation:
A quadratic function like y = x^2 represents a parabola.
To determine intervals where the function is increasing, decreasing, or constant, we analyze the sign of the function's derivative.
Taking the derivative of y = x^2, we get y' = 2x.
The derivative is positive when x > 0 and negative when x < 0.
Therefore, the function is increasing for x > 0 and decreasing for x < 0.
It is constant at the minimum point x = 0.