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Identifying Characteristics of Quadratic Functions

Identifying Characteristics of Quadratic Functions 1.1 - Solution

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a

The shape of a quadratic function is a parabola.

Since the shape of this graph is a line, not a parabola, the function is not quadratic.

b
The graph of the function is a parabola and, thus, the function is a quadratic function.
c
The function is a curve, not a parabola. This means that the function is not a quadratic function.
d
A parabola can both be faced upward or downward.

Therefore, this is a quadratic function.