Image transcription text

90 87 86 Y - 30/3X 70 2053- -8:1529 Average Hardness IHRF Scale D 10 20 30 GO "* Cold Work ure 3: Copper Sample
Hardness as a Function of % Cold Work, with 2nd-order Polynomial Trend Line

90 

87 

86 

Y - 30/3X 70 2053- -8:1529

 $3-9.81493 

Average Hardness IHRF Scale

 D

10 

20 

30

 GO

 "* Cold Work 

ure 3: Copper Sample Hardness as a Function of % Cold Work, with 2nd-order Polynomial Trend Line

Additional comments: Can you refine this graph?

Average Hardness IHRF Scale) 90 89 28 87 NO 22 D 10 20 Y-3.0032 0.2953-8.589 # -0.84495 % Cold Work Average Hardness Poly. Hodnal ure 3: Copper Sample Hardness as a Function of % Cold Work, with 2nd-order Polynomial Trend Line