The store sees an increasing trend in the data and decides to use a linear trend for forecasting. What is the trend equation for this data? $(5$ pts$)$ c$.$ Using the trend equation calculate forecasts for days $2$ through $10.$ Calculate the MAPE of this set of forecasts. $(8$ pts$)$ d$.$ Compare the MAPE of the best a in $($a$)$ with the MAPE in $($c$).$ Which method would you prefer?