Karen has heard that people are more likely to yawn after seeing others yawn. she decides to observe people to determine if this is true. karen is a(n):

Empiricist

Explanation:

Empiricism is founded by John Locke, he believed that knowledge comes from our senses such as vision, hearing, reflexes, etc.  We develop learning through sensation and perception. He believed that we gain knowledge from our experience in different situations. According to the empiricist, knowledge is not possible without experience and observation.

changes in factors like average income and preferences can cause an entire demand curve to shift right or left. this causes a higher or lower quantity to be demanded at a given price. demand curves relate the prices and quantities demanded assuming no other factors change. it is important for consumers to know this information, because it is crucial for them to know what they can afford and can't afford. i hope this .