Which of the following is not the graph of a quadratic polynomial?

Options

A.
B.
C.
D.

Answer

D

Explanation

For any quadratic polynomial `ax^(2) +bx +c, a ne 0`, the graph of the Corresponding equation `y = ax^(2) +bx +c` has one of the two shapes either open upwards like `uu` or open downwards like `uu` depending on whether `a gt 0` or `a lt `. These curves are called parabolas. so, option (d) cannot be possible. Also, the curve of a quadratic polynomial crosses the X-axis on at most two points but in option (d) the curve crosses the X-axis on the three points, so it does not represent the quadratic polynomial.