Question

Which of the following best describes the range of y = –2x^4 + 7?A. y≤–2B. y ≥ 7C. y≤ 7D. All real numbers

Answer 1

If we have the question

$y=-2x^4+7$

To get the range of the function

Let us plot the graph

The range of a function is the complete set of all possible resulting values of the dependent variable (y, usually)

The range of the function is

$\begin{bmatrix}\mathrm{Solution\colon}\: & \: y\le\: 7\: \\ \: \mathrm{Interval\: Notation\colon} & \: (-\infty\: ,\: 7\rbrack\end{bmatrix}$

Thus, the answer is option C:

$y\le7$