Q.The slope of a normal demand curve is generally __________, while the slope of a normal supply curve is generally __________.

A demand curve slopes downward (negative slope) because price and quantity demanded move oppositely; a supply curve slopes upward (positive slope) because price and quantity supplied move together. …

A normal demand curve slopes downward from left to right — as price rises, quantity demanded falls, so the two move in opposite directions, giving a negative slope. A normal supply curve slopes upward from left to right — as price rises, quantity supplied also rises, so the two move together, giving a positive slope.

• (a) positive; negative — incorrect; this reverses the two curves.
• (b) negative; positive — correct. …

Confusing 'downward-sloping' in everyday speech with a positive number — a line that slopes downward from left to right alwa …