Determine where the graph of the function 
is concave upward and where it is concave downward. Also, find all inflection points of the function.
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Express the set in roster form.{x|x is a whole number between 6 and 10}
A. {6, 7, 8, 9} B. {7, 8, 9, 10} C. {7, 8, 9} D. {6, 7, 8, 9, 10}
Solve the problem.The Little Town Arts Center charges $23 for adults, $16 for senior citizens, and $10 for children under 12 for their live performances on Sunday afternoon. This past Sunday, the paid revenue was 
for 838 tickets sold. There were 44 more children than adults. How many children attended?
A. 260 children B. 301 children C. 311 children D. 267 children
Use the coordinates of the indicated points to find the slope of the line.
A. -3 B. 1 C. 3 D. -1
Solve the problem.The number of patients Dr. Wong can see varies directly as the time it takes her to see them. If she can see 9 patients in 2 hours, how long would it take her to see 90 patients?
A. 18 hours B. 20 hours C. 19 hours D. 405 hours