Estonia has attempted to increase the country's birthrate by making payments to women who have babies. According to an article in the Wall Street Journal, "some demographers argue that paying people to have a baby simply makes them have one earlier; it doesn't necessarily make them have more." Reread the description of Estonia's program. Could the program be changed in ways that might make it more likely that Estonian women will have more children, rather than simply changing the timing of when they have children? What information would we need to have to resolve the problem of whether Estonian women are responding to the government's incentives by having more children or simply having them earlier?

The following table gives information on the quantity of glasses of lemonade demanded on sunny and overcast days. Plot the data from the table on a graph. Draw two straight lines representing the two demand curves - one for sunny days and one for overcast days.

Price in $ per glass Quantity per day weather
$0.80 30 Sunny
0.80 10 overcast
0.70 40 sunny
0.70 20 overcast
0.60 50 sunny
0.60 30 overcast
0.50 60 sunny
0.50 40 overcast

find out the slope of the total cost curve at point A and point B.

Point A is (7,300) related point is (5,175)
Point B is (12,700) related point is (14,900)