Help solving c please

The iineartrend forecasting equation for an annual time series containing 45 values (from 1963 to 2007) on net sales (in billions of dollars) is shown below. Complete (a) through is) below. A Y. =4.8+1.3Xi {E} a. Intepret the Yintercept. on. Which statement below is the interpretation of the Yintercept? The Yintercept on = 1.3 reflects the predicted net sales in 1963. The Yintercept be = 1 .3 indicates that sales are predicted to increase by $1.3 billionlyear. V The Yintercept on = 4.8 reflects the predicted net sales in 1963. The Yintercept b0 = 4.8 indicates that sales are predicted to increase by $4.8 billionlyear. b. Intepret the slope, o1. Which statement below is the interpretation of the slope? The slope b1 = 4.3 indicates that sales are predicted to increase by $4.3 billionfyear. The slope b1 = 4.3 reflects the predicted net sales in 1963. The slope b1 = 1.3 reflects the predicted net sales in 1963. V The slope b1 = 1.3 indicates that sales are predicted to increase by $1.3 billionfyear. c. What is the tted trend value for the ninth year? $El billion [Simplify your answer.)