Find the Directional Derivative of the Function $f ( x , y ) = x ^ { 2 } + y ^ { 2 }$

question 274

Multiple Choice

Find the directional derivative of the function $f ( x , y ) = x ^ { 2 } + y ^ { 2 }$ at the point $( 1,2 )$ in the direction $\theta = \frac { \pi } { 2 }$ .

• A)0
• B)1
• C)2
• D)3
• E)4
• F)5
• G)6
• H)7

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Definitions:

Wechsler Adult Intelligence Scale

A standardized test designed to measure various aspects of human intelligence and cognitive ability in adults.

Z-score

A metric that shows how many standard deviations away a specific data point lies from the average.

National Center for Health Statistics

A division of the Centers for Disease Control and Prevention (CDC) tasked with collecting and analyzing data related to the health of the United States population.

Standard Deviation

A measure reflecting the variation or spread in a collection of data points.