A study in transportation safety collected data on 42 North American cities. From each city, two of the variables recorded were explanatory variable x=percentage of licensed drivers who are under 21 years of age, and the response variable y=the number of fatal accidents per year per 1000 licenses. "R" used to investigate linear relationship between these two variables. Considering following information

Intercept=-1.597

Slope=0.287

Correlation Coefficient = 0.839387

a. Write down the equation of the estimated regression line in the context of this question. [2 Marks]

b. Provide an interpretation of the slope of the estimated regression line (pay special attention to the units of measurement for the data). Please be brief and concise. [2 Marks]

c. Provide an estimate of the number of fatal accidents when the percentage of licensed drivers who are under 21 years of age is 35