A naval base is considering modifying or adding to its fleet of 48 standard aircraft. The final decision regarding the number of aircraft to be added depends on a comparison of cost versus effectiveness of the modified fleet. Consequently, the naval base would like to model the projected percentage increase, y, in fleet effectiveness by the end of the decade as a function of the cost, x (in millions of dollars), of modifying the fleet. A first proposal is to build a simple regression model based on the experience of ten naval bases of similar size that expanded their fleets. How is sum of Y=162 If 18+32+9+37+6+3+30+10+25+2=172? IT DOESNT MAKE SENSE TO ME please explain further.