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 [tex]{x}^{2}[/tex], if positive the parabola opens up, then it will have a minimum, if negative the parabola opens down, having a maximum.
[tex] \mathbb{ANSWER} \rightarrow \boxed{ \boxed{y = - {7x}^{2} - 1 }}[/tex]
