What is the relevant range of the data below?

Cost Prediction Problem MONTH y = $5.2334x + $12,440 1 2 3 4 UNITS SOLD TOTAL COST 3,200 $31,000 2,000 $22,000 4,600 $40,000 1,200 $18,000 4,100 $36,000 5,800 $42,000 3,000 $ 29,000 1,800 $17,000 6,600 $ 45,000 1,400 $16,000 1,600 $28,000 4,200 $32,000 5 6 7 $50,000 $45,000 $40,000 $35,000 $30,000 $25,000 $20,000 $15,000 $10,000 $5,000 $0 TOTAL COST 8 9 9 10 11 12 0 1,000 2,000 5,000 6,000 7,000 3,000 4,000 Number of Units