Use a graphing calculator to plot the data and find the quadratic function of best fit.A small manufacturing firm collected the following data on advertising expenditures (in thousands of dollars) and total revenue (in thousands of dollars). Find the quadratic function of best fit. Round values to the nearest thousandth. 
A. R(x) = -0.310x2 + 2.631x + 6128.455
B. R(x) = -0.0242x2 + 7.139x + 6209.323
C. R(x) = -0.015x2 + 4.536x + 6123.841
D. R(x) = -0.091x2 + 5.952x + 6337.167
Answer: D
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= 1
A. {63.4° + 360°n, 99.5° + 360°n} B. {63.4° + 180°n, 99.5° + 180°n} C. {0° + 180°n, 63.4° + 180°n, 99.5° + 180°n} D. ?
Complete the magic (addition) square.Use each number 26, 27, 28, 29, 30, 31, 32, 33, and 34 once.
A. 
B. 
C. 
D. 
Find all the real zeros of
a. 
b. 
c. 
d. 
e. 
Solve the problem.The equation of a line is y = - 
x + 9. What is the slope of a line perpendicular to it?
A. - 
B. 
C. 
D. - 