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Concave
A shape or function curving inward, resembling the interior of a circle or sphere.
Sample Regression Line
A line that best fits the data points in a scatter plot, representing the relationship between an independent variable and a dependent variable based on sample data.
Coefficient
In algebraic expressions, a constant or fixed number that multiplies the variable, placed before it.
First-order Polynomial
A mathematical expression of the form ax + b, where a and b are constants and x is a variable.
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