which function is a quadratic function?
a. y= 2/x
b. y=2|x|
c. y=2x-3
d. y=-2x^2-x
It looks like no one is going to help us
I hope we get lucky and guess it
The quadratic function among the given options is d. y = -2x^2 - x
To determine which function is a quadratic function, we need to look for the presence of an x^2 term, which is the key characteristic of a quadratic function. Let's analyze each option:
a. y= 2/x - The function has an x term in the denominator, but it does not have an x^2 term. Therefore, it is not a quadratic function.
b. y=2|x| - This function involves absolute value but does not contain an x^2 term. Therefore, it is not a quadratic function.
c. y=2x-3 - This function has an x term but does not have an x^2 term. Hence, it is not a quadratic function.
d. y=-2x^2-x - This function includes an x^2 term (-2x^2) as well as an x term (-x). These terms make it a quadratic function.
Therefore, the quadratic function is d. y=-2x^2-x.