Find the equation of the regression line and predict y when x = 19. 
Definitions:
Pelvic Girdle
The skeletal structure in the pelvis area of vertebrates, consisting of hip bones that support the attachment of the lower limbs.
Bone Deposition
The process by which new bone tissue is formed, involving osteoblasts laying down new bone material, crucial for growth and bone healing.
Hormone
Chemical messengers produced by glands that regulate physiological activities by signaling distant organs.
Sarcoplasmic Reticulum
Specialized endoplasmic reticulum in muscle cells; stores and releases calcium ions.
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