Agree:
The demand curve typically slopes downward from left to right due to the **law of demand**, which states that as the price of a good decreases, the quantity demanded increases, and vice versa. This negative relationship between price and quantity demanded results in a downward-sloping curve.
However, this is true for most goods but may not hold for certain types of goods such as Giffen goods or Veblen goods.
Final Answer:
\[
\boxed{Agree: \; The \; demand \; curve \; generally \; slopes \; downward \; from \; left \; to \; right.}
\]