b. Quantity dema nded refers to the quantity of widgets dema ded square "The quantity dem anded of widgets is 1000units'' is not mean ingful unless we know the square over which the 1000 units are demanded Quantity dema anded is a(n) square

## Step 1:<br />First, we need to understand the concept of 'quantity demanded'. Quantity demanded refers to the quantity of a particular product or service that consumers are willing and able to purchase at a certain price. <br /><br />## Step 2:<br />The phrase "The quantity demanded of widgets is 1000 units" is incomplete without the context of the price at which these units are demanded. The quantity demanded of a product is always associated with a certain price level. <br /><br />## Step 3:<br />Lastly, quantity demanded is a variable in economics. It changes with changes in price, income, tastes and preferences, etc. It is a key concept in the law of demand which states that, all else being equal, as the price of a product increases, quantity demanded decreases; conversely, as the price of a product decreases, quantity demanded increases.