Use the table for the question(s)below.
Consider the following covariances between securities: 
-What is the variance on a portfolio that has $3000 invested in Duke Energy,$4000 invested in Microsoft,and $3000 invested in Wal-Mart stock?
Definitions:
Simple Linear Regression
A statistical method for modeling the relationship between a single independent variable and a single dependent variable, assuming a linear relationship.
Residuals
The differences between observed values and the values predicted by a statistical model, indicating the model's accuracy.
Fitted Values
Predicted values calculated from a model that represent the estimated response given the predictors.
Simple Linear Regression
A statistical method that models the relationship between two variables by fitting a linear equation to observed data.
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