A sales manager for an advertising agency believes there is a relationship between the number of contacts and the amount of the sales. To verify this belief, the following data was collected: 
What is the regression equation?
Definitions:
Genetic Reasons
Causes or explanations based on genes and heredity for certain traits or conditions.
Infant Mortality Rate
The statistical measure of the number of deaths of infants under one year of age per 1,000 live births in a given year or period.
African Americans
A demographic group in the United States with ancestry traced to the black racial groups of Africa.
Middle and Upper Classes
Social groups categorized by higher levels of wealth, income, education, or occupational prestige compared to the working or lower classes.
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