The Y-intercept,b₀,of the least squares line represents the:

A) estimated average value of Y when X = 0.
B) estimated average change in Y per unit change in X.
C) predicted value of Y.
D) variation around the sample regression line.

Y-intercept

The point where a line or curve intersects the y-axis of a graph, corresponding to the value of the dependent variable when all independent variables are zero.

Least Squares Line

A line of best fit determined by minimizing the sum of squares of the differences between observed values and the values predicted by the line.

Sample Regression Line

A line of best fit through a scatterplot of sample data points in regression analysis, used to estimate the relationship between variables.