What is the equation of this function?
A
B
C
D

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Which one ? is the answer and how to find this answer

Give the functions f(x) = |x + 2| - 3, what is the domain? a, b,c, or d all real numbers x > 2 x < -2 all real numbers and x cannot equal to 2