Question

Explain why the function represented by the equation y=ax2+bx+c is quadratic only when a≠0.

Answer 1

see below

Explanation:

y=ax^2+bx+c

Let a=0

y=0*x^2+bx+c

y = bx+c

This is the equation of a line. It is no longer quadratic, but linear. a cannot equal zero