Question

What is the range of the function y = x2?
a) all real numbers
b) x ≥ 0
c) y ≥ 0

Answer 1

The graph of y = x^2 is a parabola with the vertex at (0,0)
The range is the possible values for y. Since the graph does not go below the x-axis (where y = 0), the range is y >=0