(c) Interpret the model parameters in the context of the problem 0 a. Intercept: At t=0 (year 2010), manufacturing unit cost is $19.99 Slope: Manufacturing unit cost is decreasing every year by $1.77 on average 0 b. Intercept: In year 2011, manufacturing unit cost is $19.99 Slope: Manufacturing unit cost is decreasing every year by $1.77 on average 0 c. Intercept is not meaningful Slope: Manufacturing unit cost is increasing every year by $1.77 on average 0 d. Intercept: At t=0 (year 2010), manufacturing unit cost is $19.99 Slope: Manufacturing unit cost is increasing every year by $1.77 on average (d) What is the forecasted manufacturing unit cost in 2021? O a. $37.73 0 b. $41.28 0 C. $35.96 0 cl. $39.50 A small firm is concerned about the increase in its manufacturing costs (unit cost in dollars) over the past few years. (a) Construct a time series plot. What pattern(s) does the time series exhibit? O a. Positive linear trend O b. Negative linear trend O c. Seasonal pattern O d. Positive nonlinear trend O e. Negative nonlinear trend (b) Fit a linear trend model and provide the equation of the line fit O a. T = 20.207 + 1.6452t+0.01432 O b. T, = 1.77+ 19.99t O c. T, = 19.99+1.77t