In a study of the relationship between the Brinell hardness (x) and tensile strength in ksi (y) of specimens of cold drawn copper, the least-squares line was y = −196.32 + 2.42x. Predict the tensile strength of a specimen whose Brinell hardness is 102.7. If two specimens differ in their Brinell hardness by 3, by how much do you predict their tensile strengths to differ?

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.6: The Inverse Trigonometric Functions
Problem 91E
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In a study of the relationship between the Brinell hardness (x) and tensile strength in ksi (y)
of specimens of cold drawn copper, the least-squares line was y = −196.32 + 2.42x.
Predict the tensile strength of a specimen whose Brinell hardness is 102.7.
If two specimens differ in their Brinell hardness by 3, by how much do you predict
their tensile strengths to differ?

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