by visual inspection, determine the best-fitting regression model for the data plot below

Best fitting regression model for the given data is quadratic
Regression analysis is a set of statistical processes for estimating the relationships between a dependent variable and one or more independent variables
A quadratic function is a polynomial function with one or more variables in which the highest exponent of the variable is two
Hence, the Best fitting regression model for the given data is quadratic
The graph of a quadratic function is a curve called a parabola. Parabolas may open upward or downward and vary in width or steepness
Learn more about quadratic function and regression model here
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