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Answer Key
Grade 8 Math: Patterns in Data & Nonlinear Awareness
1.
a pattern that forms a straight-line trend (constant rate of change)
2.
a pattern that curves or changes rate — not a constant straight-line trend
3.
describing the shape/trend of data without heavy calculation
4.
differences between y-values are not roughly constant (or rates change)
5.
deciding whether a linear or nonlinear description fits the data better
6.
yes — points can cluster near a line with scatter
7.
a nonlinear (increasing at an increasing rate) pattern
8.
using the wrong model can mislead predictions and decisions
9.
straight-line trend / roughly constant rate of change
10.
curved or changing-rate trend, not a constant line
11.
describing shape/trend without heavy calc
12.
deciding which model type fits the data better
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