Which of the following equations represents a quadratic function? *
a. y = x³ + 2x² + 1
b. 2x² = 1
c. x + 1 = 0
d. y = x² + 2x + 1

The following are examples of quadratic function except ______.
a. Throwing an object upward
b. Diving from a platform
c. Hitting a golf ball
d. Holding a ball

Which of the following method is used to transform general form of quadratic function into standard or vertex form?

a. Factoring
b. Completing the Square
c. Extracting Square Root
d. Quadratic Formula

Where is the direction of opening of parabola of the given equation: y = -3x² +7x – 2?
a. Up
b. To the Left
c. Down
d. To the Right​