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6)
a) Let x and y stands for education and salary respectively.
The regression equation is given by

    
b) Coefficient of determination=r2=0.92122=0.8486 or 84.9%
84.9% variation in salary is explained by education.
c) We have to find y when x=7
=>y=0.09*7+59.98=60.61
d) Intercept: when education year of an individual are zero. His or her salary will be...