Question

Which of the following is a quadratic function?

f(x) = 0x + 3x - 6
f(x) = 2x + 5
f(x) = 3 - 4x^2
f(x) = 2^x

Answer 1

f(x) = 3 - 4x^2

Explanation:

Quadratic Equation form: f(x) = ax² + bx + c

Quadratic function has a x (variable) with and exponent of 2.

They also leave a curve line on a coordinate plane. As you can see on the picture. ↓