By visual inspection, determine the best-fitting regression model for the data
plot below.
OA. Quadratic
O B. Linear
OC. Exponential
OD. No pattern
9+
8-
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6+
5-
4-
3+
2+
1-
0
.......
0.5 1 1.5 2 2.5 3 3.5 4 4.5