Using the following data (show your work): 18. Simple linear regression can be expressed in the form D1=b0+b1t+c1. If b0=5 and b1=3 and t is measured in months, how many units are expected to be demanded a year from now? The demand is modeled using simple linear regression. 19. Using the values from the previous question: Dt=b0+b1t+ei;b0=5;b1=3 and t is measured in months; for month 9 , the error was 4 units, what was the actual demand for month 9 . The demand is modeled using simple linear regression. Using the following data (show your work): 18. Simple linear regression can be expressed in the form D1=b0+b1t+c1. If b0=5 and b1=3 and t is measured in months, how many units are expected to be demanded a year from now? The demand is modeled using simple linear regression. 19. Using the values from the previous question: Dt=b0+b1t+ei;b0=5;b1=3 and t is measured in months; for month 9 , the error was 4 units, what was the actual demand for month 9 . The demand is modeled using simple linear regression