What Is the Next Number in the Series

question 121

Short Answer

What is the next number in the series?
129   116   103   90   77   __?__

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Definitions:

Slope

In mathematics, the slope represents the steepness or angle of a line, defined as the ratio of the vertical change to the horizontal change between two points on the line.

Simple Linear Regression

A statistical method for modeling the relationship between a single independent variable and a dependent variable by fitting a linear equation to observed data.

Least Squares

A mathematical method used to determine the best-fitting line through a set of data points by minimizing the sum of the squares of the differences between observed and estimated values.

Standard Deviation

A measure of the dispersion or variability of a set of data points around the mean, indicating how spread out the data points are.