Answer: D
Explanation:
y = 16x^2 + 9x + 4
This function is non-linear because it is not in the form of line equation y = mx + b where m is the slope of the line and b is the y-intercept
Also, this equation consists of a term that is squared (-16x^2) so it is non-linear.
Therefore, option (D) This function is non-linear is correct