Using a graphing calculator
which quadratic regression equation best fits the data set?
X Y
4 109
6 88
9 52
15 42
18 50
21 78
23 98
A. y = 0.728x^2 + 20.213x + 179.246
B. y = 0.728x^2 - 20.213 + 179.246
C. y = 179.246x^2 - 20.213x + 0.728
D. y = 0.728x^2 + 0.564x + 179.246
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