Use the information given in the diagram to find A to the nearest degree. Suppose that 
and 
. 
Definitions:
Interaction
In statistics, refers to the situation where the effect of one independent variable on a dependent variable differs depending on the level of another independent variable.
Regression Equation
An equation that represents the relationship determined by regression analysis, predicting the dependent variable based on independent variables.
Dummy Variable
A variable used in regression analysis that assumes the value 0 or 1 to indicate the absence or presence of some categorical effect.
Independent Variable
A variable that is manipulated to determine its effect on a dependent variable within an experimental study.
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