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Praxis Core
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Evaluate Models for Validity and Generalizability
Grade Level
Praxis Core
5165.290 Evaluate Models for Validity and Generalizability
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An engineer measures three points on an arch and fits a parabola through them. Which critique is most appropriate for a classroom modeling discussion?
A
A parabola is proven because exactly one parabola passes through any three points
B
A parabola may be reasonable for the arch, but three points alone do not rule out other curves or construction constraints
C
The model generalizes to every arch because all arches are parabolic
D
The model is invalid because arches cannot be represented by functions
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