A function and its graph are given. Use the second derivative to determine intervals on which the function is concave down. Check these results against the graph shown. 
Definitions:
Asian and African Parents
Refers to the parenting styles and cultural practices observed among families of Asian and African heritage, often emphasizing respect, education, and discipline.
Authoritative Parents
A parenting style characterized by high expectations of maturity and high responsiveness, balancing demands with emotional support.
Responsive
Showing a positive or cooperative reaction to something.
Authoritarian Parents
Parenting style characterized by high demands and low responsiveness, where parents expect their orders to be obeyed without explanation.
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