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Math·Problem-Solving and Data Analysis·Two-variable data: Models and scatterplots

easy

The scatterplot has 8 data points.
The data points are in a quadratic pattern opening downward.
The data points have the following approximate coordinates:
(9, 27)
(21, 29)
(29, 31)
(41, 35)
(49, 35)
(61, 32)
(71, 31)
(81, 30)

Which of the following equations is the most appropriate quadratic model for the data shown?

A

$y=-0.005(x-50{)}^2+34$

B

$y=-0.005(x-34{)}^2+50$

C

$y=0.005(x-50{)}^2+34$

D

$y=-0.005(x-34{)}^2-50$