Use the REGRESSION feature on a graphing calculator.Since 1984 funeral directors have been regulated by the Federal Trade Commission. The average cost of a funeral for an adult in a Midwest city has increased, as shown in the following table. 
Let x represent the number of years since 1980. Use a graphing calculator to fit a quartic function to the data. Round your answer to five decimal places.
A. y = -2.047489x2 + 212.82699x + 1879.85469
B. y = -0.04268x4 + 1.53645x3 - 16.76289x2 + 231.82723x + 1927.58518
C. y = 170.5971x + 1991.5213
D. y = -0.04268x4
Answer: B
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A. 172 B. -176 C. 27 D. -31
Solve the problem.License plates are made using 3 letters followed by 3 digits. How many plates can be made if repetition of letters and digits is allowed?
A. 17,576,000 B. 1,757,600 C. 1,000,000 D. 308,915,776
Solve the problem.A generator produces an alternating current according to the equation 
where t is time in seconds and I is the current in amperes. What is the smallest time t such that 
A. 
sec
B. 
sec
C. 
sec
D. 
sec
Solve the equation and check your solution.
= - 
A. -2, 2 B. 2 C. -2, 0, 2 D. no solution