Answer:
I don't know see the bar graph BUT i do know some caffeinated drinks students would consume. Coffee, Soda, Tea, & Energy Drinks.
Step-by-step explanation:
It is -27 because a negative number times a positive number is negative. In this case it is -9 times (3) which is -27.
Take f"(x)=0 to find critical values v1,v2,...
take f (vn)
produces inflection points
It can be simplified to 9/28