Solve the System of Equations by Using Substitution $$\left\{ \begin{array} { r } x + 7 y = - 2 \\3 x + y = 34\end{array} \right.$$

question 9

Multiple Choice

Solve the system of equations by using substitution.
- $$\left\{ \begin{array} { r } x + 7 y = - 2 \\3 x + y = 34\end{array} \right.$$

• A) x = -2, y = 3
• B) x = 7, y = 12
• C) x = 12, y = -2
• D) x = 3, y = 7

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Definitions:

Correlation Coefficient

Quantitative assessment designed to determine the magnitude and directionality of a linear association between two variables.

Regression Analysis

A statistical method for estimating the relationships among variables, particularly the relationship between a dependent variable and one or more independent variables.

SST

Total Sum of Squares, a measure in statistical analysis that quantifies the total variation within a dataset.

SSR

The sum of squared deviations of predicted values from the mean of observed values in regression analysis.