A multiple regression analysis showed the following ANOVA table result. 
Based on the information in the ANOVA, how many independent variables were included in the multiple regression analysis?
Definitions:
Optimal R&D
The most efficient level of investment in research and development activities that maximizes the benefit to a company or society.
Venture Capital
Funding given to startups and small businesses by investors who see potential for significant growth over time.
Start-Ups
Businesses in their early stages of operation, often characterized by innovative ideas and solutions to market needs, seeking to grow and establish themselves.
Marginal Cost
The money required to produce an additional unit of a product or service.
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