In which direction do the parabolas of the previous exercise open? Also specify the maximum and minimum values of the function.

a) [[$ f(x) = x^2 $]]

Answer:
The parabola opens upwards downwards.
The function's maximum minimum value cannot be determined.

b) [[$ f(x) = -9x^2 $]]

Answer:
The parabola opens upwards downwards.
The function's maximum minimum value cannot be determined.

c) [[$ f(x) = 13x^2 $]]

Answer:
The parabola opens upwards downwards.
The function's maximum minimum value cannot be determined.

d) [[$ f(x) = -10x^2 $]]

Answer:
The parabola opens upwards downwards.
The function's maximum minimum value cannot be determined.