MEDAL +FAN

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

Question

MEDAL +FAN

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

anonymous · Answer

Some polynomials have special names. Degree 1 are linear (mx+b), degree 2 are quadratic (ax²+bx+c), degree 3 are cubic (ax³+bx²+cx+d), from there it's quartic (degree 4) and after that they're usually just named after their degree.

anonymous · Answer

1 A