Find the direction cosines of a vector perpendicular to 
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Definitions:
Relationship
The way in which two or more concepts, objects, or people are connected, or the state of being connected.
Slope
The measure of the steepness or incline of a line, indicating the rate of change between two variables.
Linear Regression Equation
An equation that models the linear relationship between a dependent variable and one or more independent variables.
Pearson r
A measure of the linear correlation between two variables, ranging from -1 (perfect negative correlation) to +1 (perfect positive correlation).
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