Two specimens of cold rolled steel sheet, which have different copper contents and annealing temperature are measured in hardness with the following results: First column = Hardness Second column = Copper content Third column = Annealing temperature a) Fit an equation of the form (image 2), where x1 represents the copper content, x2 represents the annealing temperature, and y represents the hardness.
Two specimens of cold rolled steel sheet, which have different copper contents and annealing temperature are measured in hardness with the following results: First column = Hardness Second column = Copper content Third column = Annealing temperature a) Fit an equation of the form (image 2), where x1 represents the copper content, x2 represents the annealing temperature, and y represents the hardness.
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Two specimens of cold rolled steel sheet, which have different
copper contents and annealing temperature are measured in hardness with the following results:
First column = Hardness
Second column = Copper content
Third column = Annealing temperature
a) Fit an equation of the form (image 2), where x1 represents the copper content, x2 represents the annealing temperature, and y represents the hardness.
b) Estimate the hardness of a steel sheet with a copper content of 0.05% and an annealing temperature of 1150 ° F.
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