## Math Problem Statement

**Why do we square the residuals when using the least-squares line method to find the line of best fit?**

A.)

It amplifies the effect of having negative and positive residuals.

B.)

Squaring the residuals makes it easier to identify smaller residuals.

C.)

We don't square the residuals when using the least-squares method.

D.)

It cancels out the effect of having negative and positive residuals.

## Solution

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## Math Problem Analysis

### Mathematical Concepts

Regression Analysis

Least-Squares Method

Residuals

### Formulas

Sum of Squared Residuals: ∑(y_i - ŷ_i)^2

### Theorems

Least Squares Minimization

### Suitable Grade Level

Grades 10-12

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