Suppose That $T ( x , y ) = x ^ { 2 } + 3 y ^ { 2 } - x$

question 61

Essay

Suppose that $T ( x , y ) = x ^ { 2 } + 3 y ^ { 2 } - x$ is the temperature (in degrees Celsius)at the point $( x , y )$ (where x and y are in meters).If you are standing at the point $( - 2,1 )$ and proceed in the direction of the point $( - 6 , - 3 )$ , will the temperature be increasing or decreasing at the moment you begin? At what rate? Give your answer to 4 decimal places.

---

Definitions:

Criterion-related Validity

The extent to which a test successfully measures an operational variable and can predict a criterion or outcome.

Validity

The extent to which a test, measurement, or research accurately reflects or assesses the specific concept it is intended to measure.

Job Performance

The degree to which an employee successfully fulfills the roles, responsibilities, and tasks of their job position.

Validity

The accuracy with which a test or measurement assesses what it intends to measure.