Between Now and the Year 2020, the Number of Older

question 79

Multiple Choice

Between now and the year 2020, the number of older adults with substance abuse disorder is expected to

• A) decline slightly.
• B) remain constant.
• C) increase somewhat.
• D) increase greatly.

---

Definitions:

Midpoint Method

The midpoint method is a technique used in economics to calculate the elasticity of a variable with respect to another, using the midpoint between two points on a curve to avoid bias from using either endpoint.

Absolute Value

A numerical value without regard to its sign, symbolized as |x|, representing the distance of a number on the number line from the origin.

Percentage Change

Percentage change is a mathematical calculation that shows how much a specific number has increased or decreased, expressed as a percentage of its previous value.

Cross-price Elasticity

A measure of how the quantity demanded of one good responds to a change in the price of another good, represented as a ratio.