You are given the following monthly demand data for Apple Airpods at Verizon.

Period $1$: Demand: $1279$

Period $2$: Demand:$1,502$

Period $3$: Demand:$1,448$

Period $4$: Demand: $1,483$

Period $5$: Demand: $1,862$

Period $6$: Demand: $1,943$

Period $7$: Demand: $2,273$ Estimate a simple linear regression line using the data from Periods $1-7.$

Forecast the demand for Period $10$ using the regression line you estimated to incorporate trend.