a smooth curve fitted to the set of paired data in regression analysis; for linear regression the curve is a straight line

a line drawn through the points on a scatterplot to summarise the relationship between the variables being studied

also called least-squares line A line on a scatterplot predicting the average value of the response variable for a given value of the explanatory variable.

A line with the equation Y = a + bX which reflects the forecasted values of the unknown variable in regression analysis. Y is the value of the unknown variable, a is the y-axis intercept, X is the known variable, and b is the slope of the line. This line is the best linear fit to all points on the graph.

(n) A line mark used in conjunction with point marks to represent data trends in a visualization. Although this line, either linear or curved, can be drawn freehand, it is usually calculated using statistical techniques.

A fitted line determined by a specific algebraic technique.