Answer: Has increased.
Explanation: Income per person has increased over the years because the cost of living and expenses have also increased. As the cost of items go up, income increases to help consumers be able to afford living and purchasing goods and services.
Answer: Option D
Explanation: In simple words, price elasticity refers to the degree of change in demand of a commodity with respect to change in its price. It generally shows the fact that when the price of a commodity rises the demand for ti decreases due to various phenomenon coming into force such as income effect etc.
The price elasticity is calculated by dividing the change in quantity demanded with the change in price.
<span>1.</span><span>I once saw an advertisement for a weight loss supplement. The
persons in the ad seemed to change significantly after using the product. Apart
from their appearance, everything seemed to be going better for them.</span>