Let $f ( x , y ) = \frac { 3 x - y } { x + y }$

question 219

Multiple Choice

Let $f ( x , y ) = \frac { 3 x - y } { x + y }$ . Find the value of the partial derivative $f _ { y } ( 1,1 )$ .

• A) \(- 4\)
• B)1
• C)2
• D)3
• E)4
• F) \(- 1\)
• G) \(- 2\)
• H) \(- 3\)

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Definitions:

Stored Fat

body fat accumulated and preserved in the human body as a source of energy for future use.

Appetite

The natural desire to satisfy a bodily need, especially for food.

Insulin

A chemical produced in the pancreas that assists in regulating sugar levels in the blood by promoting glucose intake by tissues.

Medial Hypothalamus

An area of the brain, part of the hypothalamus, involved in the regulation of appetite, aggression, and certain aspects of emotion.