Question

PLEASEEEE
Which of the following is a quadratic function?
y = x3 - 3x - 20
y = 3x – x + 4
y = x2 – 4x + 7
y = 2x4 + 9x + 17

Answer 1

A quadratic function has an x^2 and no high exponent

Answer 2

we call this the degree of the function. A quadratic function has degree 2.

Answer 3

y = x3 - 3x - 20 has degree 3
y = 3x – x + 4 has degree 1
y = x2 – 4x + 7 has degree 2 =)
y = 2x4 + 9x + 17 has degree 4