Your friend asks you if you feel nervous before an exam

I shall not reply with I am nervous even though I am otherwise it would drag both of our confidence more down and exam shall not go as well as we thought

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 .

answer; with few regulations protected the prices of crops which made farmers leave their farms and migrate to the big cities to work in factories;