Estimate the sales per store on a day in which the temperature is 10C..................................... dollars

'he owner of a large chain of ice-cream stores would like to study the effect of atmospheric temperature (C) on :ales (in $1,000) during the winter season. A random sample of 8 days is selected with the results given below. Day 1 2 3 4 5 6 7 8 Sales 1.5 1.7 1.8 2.0 2.4 2.2 2.7 2.9 \"C -10 -8 -5 -2 3 'IO 12 20