Which function is a quadratic function?
A. y=2/x
B. y=2/x/
C. y=2x-3
D. y=-2x^2-x
quadratic means 2nd-degree.
That is, the highest power of x is x^2.
what is the answer
To identify a quadratic function, we need to look for the presence of an x^2 term. The x^2 term is what makes a function quadratic. Let's analyze the given options:
A. y=2/x - This function does not have an x^2 term, so it is not quadratic.
B. y=2/x/ - This function does not have an x^2 term either, so it is not quadratic.
C. y=2x-3 - This function does not have an x^2 term, so it is also not quadratic.
D. y=-2x^2-x - This function contains an x^2 term, -2x^2, making it a quadratic function.
Therefore, the quadratic function among the given options is D. y=-2x^2-x.