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WILL MARK BRAINLIEST!!!!!

Which quadratic function best fits this data?



y=9.16x2+73.04x+183.3

y=−9.16x2−73.04x+183.3

y=9.16x2−73.04x+183.3

y=−9.16x2+73.04x+183.3

WILL MARK BRAINLIEST Which quadratic function best fits this data y916x27304x1833 y916x27304x1833 y916x27304x1833 y916x27304x1833 class=

Respuesta :

The data is larger for intermediate values of x, so the parabola opens downward. That leaves only the 2nd and 4th choices, where the x² coefficient is negative.

To determine which of those is appropriate, it is only necessary to consider x=1. The 2nd choice will give a y-value near 100; the 4th choice will give a y-value near 250.

The fourth choice is appropriate:

... y = -9.16x² +73.04x +183.3

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Alternatively, you can consider that for the x-coordinate of the vertex to be positive (it's about +4), the coefficients of the x² and x terms must have opposite signs. Using this consideration, you don't even need to evaluate the expression to determine that the 4th choice is the correct one.

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