Use a graphing calculator to plot the data and find the quadratic function of best fit.A rock is dropped from a tall building and its distance (in feet) below the point of release is recorded as accurately as possible at various times after the moment of release. The results are shown in the table. Find the regression equation of the best model. 
A. y = - 148.4 + 112x
B. y = 15.95x2
C. y = -74.9 + 290 lnx
D. y = 13.0 e0.686x
Answer: B
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Solve the equation.3(6 + 3x) = 
A. {9}
B. {3}
C. {-3}
D. 
Solve the problem.Frank can type a report in 3 hours and James takes 5 hours. How long will it take the two of them typing together?
A. 
hr
B. 
hr
C. 
hr
D. 5 hr
Answer the question.Describe how the graph of y = 4.9(x - 6)2 - 3 may be obtained from the graph of y = x2.
A. Stretch horizontally by a factor of 4.9, shift 6 units to the left, and shift 3 units down. B. Stretch vertically by a factor of 4.9, shift 6 units to the right, and shift 3 units down. C. Stretch vertically by a factor of 4.9, shift 6 units to the left, and shift 3 units down. D. Stretch vertically by a factor of 4.9, shift 6 units to the right, and shift 3 units up.
Solve the system analytically. x - y + 4z = -33x + z = 0 x + 5y + z = 15
A. {(0, 3, 0)} B. ? C. {(0, 3, -3)} D. {(0, 0, 3)}