Question

Which of the following equations has a maximun?

Answer 1

Answer:

The answer is option D.

y = - 7x² - 1

It's maximum is ( 0 , - 1)

Hope this helps you

Answer 2

Linear functions never have maxima and minima, so a) is discarded.

In the options there are quadratic functions, they can present either a maximum or a minimum.

You can know instantly by seeing the sign of the variable ${x}^{2}$, if positive the parabola opens up, then it will have a minimum, if negative the parabola opens down, having a maximum.

$\mathbb{ANSWER} \rightarrow \boxed{ \boxed{y = - {7x}^{2} - 1 }}$