Indicate which curve can reflect the economic phenomenon of high quality and high price

The marginal return response is the slope on the chart.

b, c, a, d (a is actually right), c (median vc q), a (median fc q).

A freshman in high school? Really? If it's true, it's pretty impressive. Some of my freshman students were reluctant to delve into this knowledge.

The consciousness of letters is what you call them.

If you want to read economics books, you have to read mainstream economics textbooks. Don't read the so-called economics books compiled by some non-scholars in China. There are a lot of mistakes and misleading in it.

These two diagrams can only illustrate one economic phenomenon, and they are not enough to the extent of economic principles. Generally speaking, when the demand increases, that is, people are eager to buy more things, at this time, things are scarce and expensive, so the first will definitely increase, and at the same time, manufacturers are also happy to provide more goods to meet people's needs.

Comparing the two graphs, you can see that the original d0 curve has now moved to the position of d1. A shift in the demand curve outward (actually to the right) means that the overall level of demand rises. The supply curve has not changed, so the overall state of supply has not changed qualitatively, only the original equilibrium point, e0, has changed along the supply curve to e1

The new e1 is higher than e0 in terms of ** (p) and quantity (q) on the coordinate axis, for reasons I explained in 4. The demand curve moves outward, and the supply curve remains unchanged, which will bring about a simultaneous increase in the number of commodities and quantity.

B test question analysis: strict implementation of strict economy, high-end tobacco and alcohol consumption decreased, resulting in its first decline, the demand curve should be shifted to the left, so the item does not fit the topic, can not be selected; The demand for commodities increases, ** increases, and the curve needs to shift to the left, so the phenomenon expression reflected in the two items conforms to the changes reflected in Figure 7, so it can be selected; With the rapid growth of online shopping, the rapid development of e-commerce, and the increase in supply, the supply curve should be shifted to the right, so the item does not meet the theme and cannot be selected. Therefore, the answer is item b.

Under normal circumstances, the higher the tax rate, the more tax revenue, but when the tax rate is increased beyond a certain limit, the operating cost of the enterprise increases, the investment decreases, and the income decreases, that is, the tax base decreases, which leads to the reduction of the tax revenue, and the curve that depicts the relationship between the tax and the tax rate is called the Laffer curve.

Laffer Curve: The Laffer Curve Theory was developed by Arthur Brown, a representative of the supply-side school and a professor at the Southern California Graduate School of Business. Laffer proposed.

In general, the higher the tax rate, the more tax revenue, but when the tax rate increases beyond a certain limit, the operating cost increases, decreases, and income decreases, that is, the tax base decreases, which leads to a decrease in tax revenue. Significance: (1) It shows that high tax rates do not necessarily promote economic growth and achieve high incomes, and high incomes do not necessarily require high tax rates.

Because high tax rates will weaken the vitality of economic agents, leading to economic stagnation or decline, high tax rates often bring excessive reductions and exemptions. (2) It is also stated that, for the same reasons mentioned above, two different tax rates may be applied to the same amount of income. (3) The optimal combination between tax rates and tax revenues and economic growth is rare in practice, but the curve proves to be possible in theory.

Upstairs nonsense, the smile curve represents the profit of industrial products, the left high represents the research and development link, the middle low represents the processing link, the right high represents the sales and service link, the two sides are the high profit link, and the middle is the low profit link connected like a smile curve, so the name is taken, hope to adopt.

The demand curve is not two. Because two articles mean that under the same **, consumers have two different needs. But all consumers should be rational, and it is impossible to choose the one with less.

For example, 5 dollars for 1 bottle of Coke, or 5 dollars for 10 bottles of Coke. No fool would choose 1 bottle.

At most, two represent different meanings. For example, under different economic forms, or different time periods, under different needs. For example, now it's 5 yuan for 1 bottle of Coke. But 50 years ago, 5 dollars could buy 10 bottles of Coke at that time.

One is the change caused by itself, and the other is that the translation of the line is caused by external factors, and I don't quite understand.

It's too general, dear, is it good to be specific?