Answer:
The correct answer is letter "D": backward bending.
Step-by-step explanation:
Named after German statistics Ernst Engel (1821-1896), the Engel curve portraits the relationship between the amount of food households buy as long as their income increase. Engels stated that the more the household increase is the minor the amount of food will represent of the income- Households with low income, instead, will spend more if the income in food.
Plotted in a graph, in the case of inferior goods -those that decrease in consumption as the household income increases, its curve is backward bending meaning less of the good is being acquired as the household receives more money.
Thus, home improvements will represent an inferior good for Joyce and Larry as long as their income keeps rising. The Engel curve for Joyce and Larry home improvements will be backward bending.