Let W Be a Vector with Initial Point (4,-4)and Terminal $\mathbf { w } = 8 \mathbf { i } - 3 \mathbf { j }$

question 3

Multiple Choice

Let w be a vector with initial point (4,-4) and terminal point (2,5) .Write w as a linear combination of the standard unit vectors i and j.

• A)? \(\mathbf { w } = 8 \mathbf { i } - 3 \mathbf { j }\)
• B)? \(\mathbf { w } = 0 \mathbf { i } + 3 \mathbf { j }\)
• C)? \(\mathbf { w } = \mathbf { i } + 6 \mathbf { j }\)
• D)? \(\mathbf { w } = - 2 \mathbf { i } + 9 \mathbf { j }\)
• E)? \(\mathbf { w } = 6 \mathbf { i } - 9 \mathbf { j }\)

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Definitions:

Just Noticeable Threshold

The minimum difference in stimulation that a person can detect 50% of the time; also known as the difference threshold.

Signal-detection Threshold

The sensory level at which a stimulus is detected 50% of the time, highlighting the ability to identify under conditions of uncertainty.

Psychophysics

The scientific study of the relationship between stimuli and the sensations and perceptions they produce.

Vision Scientist

A researcher who studies the physiology of vision, visual processing, and perception.