Question

please help!

1.When a parabola opens upward, we call the y-value of the vertex the minimum value of the function. Why do you think we call it the minimum value?
2.When a parabola opens downward, we call the y-value of the vertex the maximum value of the function. Why do you think we call it the maximum value?
3.Pick out any quadratic equation from the lessons you’ve studied so far. Type the equation in your post and tell the vertex. Does the equation have a minimum or maximum value and what is it?

its about quadratics and radicals:)

Answer 1

because in first case, the value of y at vertex is the minimum value y can obtain

and similar is in the second case