Which of the following profit functions has a quadratic form?
I. x2 + 3x − 4
II. 3x2 + 4x + 6
III. 3x − 4
A) I only
B) II only
C) III only
D) I and II only
E) I, II, and III

Question

Quizplus · Accepted Answer

A quadratic function is characterized by the highest power of the variable being 2. Both I (x^2 + 3x - 4) and II (3x^2 + 4x + 6) have the highest power of x as 2, making them quadratic functions. III (3x - 4) is linear, not quadratic, because the highest power of x is 1.

Which of the Following Profit Functions Has a Quadratic Form