Use a graphing calculator or other technology to answer the question. Which quadratic regression equation best fits the data set?

yˆ=179.246x2−20.213x+0.728

yˆ=0.728x2+20.213x+179.246

yˆ=0.728x2+0.564x+179.246

yˆ=0.728x2−20.213x+179.246
x y
4 109
6 88
9 52
15 42
18 50
21 78
23 98

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