predictor variables: first column is hardness, second column is tensile strength

        45.00        162.00
         55.00        233.00
         61.00        232.00
         66.00        231.00
         71.00        231.00
         71.00        237.00
         81.00        224.00
         86.00        219.00
         53.00        203.00
         60.00        189.00
         64.00        210.00
         68.00        210.00
         79.00        196.00
         81.00        180.00
         56.00        200.00
         68.00        173.00
         75.00        188.00
         83.00        161.00
         88.00        119.00
         59.00        161.00
         71.00        151.00
         80.00        165.00
         82.00        151.00
         89.00        128.00
         51.00        161.00
         59.00        146.00
         65.00        148.00
         74.00        144.00
         81.00        134.00
         86.00        127.00

response variable: abrasion loss

       372.00
        206.00
        175.00
        154.00
        136.00
        112.00
         55.00
         45.00
        221.00
        166.00
        164.00
        113.00
         82.00
         32.00
        228.00
        196.00
        128.00
         97.00
         64.00
        249.00
        219.00
        186.00
        155.00
        114.00
        341.00
        340.00
        283.00
        267.00
        215.00
        148.00
