Which function is a quadratic function?
u(x) = –x + 3x2 – 8
v(x) = 2x2 + 8x3 + 9x
y(x) = x2 + 3x5 + 4
z(x) = 7x2 + 2x3 – 3

u(x) is a quadratic function.

Step-by-step explanation:

We are asked to choose the correct option that represents a quadratic function.

Since we know that a quadratic function is a second degree polynomial in form .

Upon looking at our given choices we can see that the function represented by option B and D are third degree polynomial, while the function represented by option C is a fifth degree polynomial, therefore, these are not correct choices.  

The polynomial represented by option A is a second degree polynomial and we can rewrite it in standard form of quadratic function as:.

Therefore, option A is the correct choice.

option: d is the correct answer.

d) none of the above.

step-by-step explanation:

clearly from the figure attached to the question we could see that there is no shape given. hence without any shape given in the figure and after rotation we can't obtained a square pyramid.

since, to obtain a image we need a proper figure of the pre-image so that it can be transformed.

hence, the correct answer is:

d) none of the above.

step-by-step explanation: