Freight car loadings during an 18 -week period at a port are: o. Compute a linear trend line for freight car loadings. (Use of Excel's Trendline, with display Equation on chart option, is recommended). (Round the finat answers to 3 decimal places.) Y= x+ b. Use the trend equation to predict loadings for weeks 19 and 20 . (Round the finat onuwers to 2 decimal ploces.) c. The manager intends to install new equipment when the volume reaches 750 loadings per week. Assuming the current trend continues, the loading volume will reach that level in approximately what week? (Round the finat answer to the neorest wholo week.) Approximate week to reach level