Do not include anything other than numbers in your responses. For example, do not include comma or dollar sign in your numbers. As a rule of thumb, keep 2 decimal places for larger numbers and 3 decimal places for smaller numbers less than 1. Develop a linear trend equation for the following data. Then use the equation to predict the demand of period 7 and 8. Period Demand 1 117 2 126 3 151 4 5 157 177 172 900 6 Sum 21 Sum of (Period Squared): Sum of (Period Demand): Slope: Intercept: Forecast of Period 7: Forecast of Period 8