If the price of a necessity like insulin increases, and consumers continue to purchase it at the same or higher quantity, it is accurate to say that the demand for insulin is elastic.

If the price of insulin goes up but people still buy the same amount or even more, this means that demand for insulin is not elastic, but rather inelastic. Inelastic demand occurs when consumers need a product, like insulin, and are willing to pay higher prices because they can't do without it. For example, someone with diabetes relies on insulin to stay healthy, so even if the price rises, they will still purchase it to manage their condition. This shows that the quantity demanded does not change much with price changes for essential goods. Therefore, when demand is inelastic, it indicates that consumers prioritize the necessity over the cost.