Step: 1

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

Step: 2

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

Step: 3

The income of the dealer in 1990 was $45000.

Correct Answer is : $45,000

Step: 1

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

Step: 2

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

Step: 3

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

Correct Answer is : 10 million tons

Step: 1

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

Step: 2

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

[The vertical coordinate of the point corresponding to 4 years is 14.]

Step: 3

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

[The vertical coordinate of the point corresponding to 7 years is 10.]

Step: 4

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

[Subtract 10 from 14.]

Step: 5

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

Correct Answer is : 4

Step: 1

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

Step: 2

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

Step: 3

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

Step: 4

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

Step: 5

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

Step: 6

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.

Step: 7

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

Correct Answer is : 3^{rd} - 4^{th}

Step: 1

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

Step: 2

Speed = Distance time

[Speed is defined as the rate of distance traveled.]

Step: 3

So, the speed at which Paula drives = 150 3 = 50 mph

[Divide the vertical coordinate of any point by the corresponding horizontal coordinate.]

Step: 4

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

Correct Answer is : 50 mph

Step: 1

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

Step: 2

Speed = Distance time

[Speed is defined as the rate of distance traveled.]

Step: 3

So, the speed at which Valerie drives = 100 2 = 50 mph

[Divide the vertical coordinate of any point by the corresponding horizontal coordinate.]

Step: 4

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

Correct Answer is : 50 mph

Step: 1

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

Step: 2

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

[The corresponding value of the weekly pay is $10 when the height of the point represents the value 3.]

Step: 3

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

[The corresponding value of the weekly pay is $30 when the height of the point represents the value 9.]

Step: 4

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

= $30 - $10 = $20

[Substitute and subtract.]

Step: 5

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

Correct Answer is : $20

Step: 1

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

Step: 2

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

[The final point represents a distance of 400 m.]

Step: 3

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

Step: 4

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

Correct Answer is : 40 sec

Step: 1

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

Step: 2

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

Step: 3

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

Correct Answer is : $1,000

Step: 1

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

Step: 2

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

Step: 3

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

Step: 4

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

Correct Answer is : 100 lb

Step: 1

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

Step: 2

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

Step: 3

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

Step: 4

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

Correct Answer is : 60 years

Step: 1

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

Step: 2

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

Step: 3

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

Correct Answer is : 1995

Step: 1

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

Step: 2

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

Step: 3

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

Step: 4

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

Correct Answer is : $50,000

Step: 1

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

Step: 2

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

[The vertical coordinate of the point corresponding to 2 years is 18.]

Step: 3

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

[The vertical coordinate of the point corresponding to 6 years is 12.]

Step: 4

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

[Subtract 12 from 18.]

Step: 5

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

Correct Answer is : 6

Step: 1

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

Step: 2

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.

Step: 3

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

Correct Answer is : 83

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