Question

Which of the following is a quadratic function?
A. y = x2 - 50
B. y = x3 – 40x
C. y = x4 + 18x
D. y = x – 81

Identify the quadratic function from the choices below whose parabola opens upward.
A. y = 3x – 5x2
B. y = 4x2 – 6x – 2
C. y = 7x – 3x2 + 7
D. y = 100 – 4x2

Answer 1

A. and B.
assuming x2 = x^2

Answer 2

Identify the quadratic function from the choices below whose parabola opens downward.
A. y = -5x + x2
B. y = 2x2 – 4x
C. y = x2 – 11x + 7
D. y = x – 2x2 + 9

Does the function f(x) = x2 - 2x + 2 have a maximum or minimum value?

A. Maximum
B. Minimum

CAN YOU HELP ME WITH THESE TWO @shan4453

Answer 3

D. and minimum