The height of each point in the graph indicates the income (in $1000) of the dealer in the particular year.

From the graph, the incomes of the dealer in 1985, 1990, 1995 and 2000 are $40000, $45000, $35000, and $50000.

The income of the dealer in 1990 was $45000.

From the plot the consumption of the goods in 1999 was 35 million tons.

The consumption of the goods in the year 2000 was 25 million tons.

So, the decrease in the consumption of goods is 35 - 25 = 10 million tons.

The height of each point in the scatter plot indicates the number of hours a child of the particular age sleeps for.

From the graph, the number of hours a 4 year old child sleeps is 14.

From the graph, the number of hours a 7 year old child sleeps is 10.

The difference between the number of sleeping hours of a 4 year old and 7 year old child = 14 - 10 = 4 hours.

So, a 4 year old child sleeps for 4 more hours than a 7 year old child.

The number of cars sold in different quarters of the year 1995 is shown on the given scatter plot.

The number of cars sold in the 1^st quarter of the year 1995 = 100.

The number of cars sold in the 2^nd quarter of the year 1995 = 150.

The number of cars sold in the 3^rd quarter of the year 1995 = 250.

The number of cars sold in the 4^th quarter of the year 1995 = 200.

By looking at the above data, we notice that, the number of cars sold is increased from 1^st quarter to 3^rd quarter, and decreased from 3^rd quarter to 4^th quarter.

Therefore, in between 3^rd and 4^th quarters the number of cars sold is declined.

Each point on the scatter plot represents the distance in miles traveled by Paula by the particular time.

Speed = Distancetime

So, the speed at which Paula drives = 1503= 50 mph

So, Paula is driving at 50 mph speed from St. Paul to Providence.

Each point on the scatter plot represents the distance in miles traveled by Valerie by the particular time.

Speed = Distancetime

So, the speed at which Valerie drives = 1002= 50 mph

So, Valerie is driving at 50 mph speed from Milan to Rosedale.

The height of each point in the plot represents the number of hours worked corresponding to the weekly pay.

The weekly pay is $10 when the number of hours worked per week is 3.

The weekly pay is $30 when the number of hours worked per week is 9.

Increase in the weekly pay with the increase in the number of hours worked from 3 to 9 = Weekly pay when the number of hours worked is 9 - Weekly pay when the number of hours worked is 3

So, the increase in the weekly pay as the number of hours worked increases from 3 to 9 is $20.

The height of each point in the plot represents the time taken to cover the corresponding distance.

From the plot, the total distance recorded is 400 m.

The vertical coordinate corresponding to the distance of 400 m covered is 40.

So, the time taken to cover the total distance is 40 sec.

The height of each point in the plot represents the contribution made in that particular year.

The height of the point corresponding to the 1^st year represents the value $1000, which is the least.

So, the minimum contribution made to the orphanage was $1,000.

In the scatter plot, the horizontal axis represents Dennis's age and the vertical axis represents his weight in lb.

The vertical distance of each point in the scatter plot indicates the weight of Dennis as he grew old.

From the graph, the vertical distance of the point corresponding to 20 is 100.

So, Dennis weighed 100 lb when he was 20 years old.

In the scatter plot, the horizontal axis represents Frank's age and the vertical axis represents his weight in lb.

The vertical distance of each point in the scatter plot indicates the weight of Frank as he grew older.

From the graph, the vertical distance of the point corresponding to age 60 is 175.

So, Frank's weight was 175 lb when he was 60 years old.

The height of each point in the graph indicates the income (in $1000) of the dealer in the particular year.

From the graph, the incomes of the dealer in 1985, 1990, 1995 and 2000 are $40000, $45000, $35000 and $50000 respectively.

The income of the dealer in the year 1995 was the least.

In the scatter plot, the horizontal axis indicates the year and the vertical axis indicates the income (in $1000) earned by the wholesale dealer.

The height of each point in the graph indicates the income (in $1000) of the dealer in the particular year.

From the graph, the vertical coordinate of the point corresponding to the year 2000 is 50.

So, the income of the wholesale dealer in 2000 was $50,000.

The height of each point in the scatter plot indicates the number of hours a child of the particular age sleeps for.

From the graph, the number of hours a 2 year old child sleeps is 18.

From the graph, the number of hours a 6 year old child sleeps is 12.

The difference between the number of sleeping hours of a 2 year old and 6 year old child = 18 - 12 = 6 hours

So, a 2 year old child sleeps for 6 more hours than a 6 year old child.

Draw a vertical line starting from 20 hours in the scatter plot. This line intersects the trend line at a point.

From the intersection, draw a horizontal line that intersects the y-axis. This intersection point on the y-axis gives the required test score as the y-axis represents the test scores.

So, a student who studied for 20 hours would have scored about 83 points.