Step: 1

The vertical coordinate of each point in the scatterplot represents Andrew's height and the horizontal coordinate represents his age.

Step: 2

From the graph, the vertical coordinate of the point corresponding to 15 years is 5 ft.

Step: 3

So, Andrew was 5 ft tall when he was 15 years old.

Correct Answer is : 5 ft

Step: 1

The vertical coordinate of each point on the scatter plot indicates the distance traveled by Diane during each hour.

Step: 2

The distance traveled in the first hour of the journey is 50 km.

Step: 3

The distance traveled in the second hour is 55 km.

Step: 4

The distance covered in third hour is 52.5 km. as it is in between 50 and 55.

Step: 5

The total distance covered in the first three hours of the journey = 50 + 55 + 52.5 = 157.5 km.

[Add.]

Step: 6

The distance traveled by Diane in 3 hours is 157.5 km.

Correct Answer is : 157.5 km

Step: 1

In the scatterplot, the horizontal axis represents the year and the vertical axis represents the cost per barrel (in $).

Step: 2

The height of each point on the scatterplot represents the cost per barrel (in $) of crude oil in the corresponding year.

Step: 3

From the graph, the vertical coordinate of the point corresponding to the year 1998 is 25.

Step: 4

So, the cost of crude oil per barrel in 1998 was $25.

Correct Answer is : $25

Step: 1

In the scatter plot, the horizontal axis represents the year and the vertical axis represents the cost per barrel (in $).

Step: 2

From the graph, the minimum cost of crude oil per barrel is $20.

Step: 3

From the graph, the horizontal coordinate corresponding to $20 is 1996.

Step: 4

So, the cost of crude oil per barrel is minimum in the year 1996.

Correct Answer is : 1996

Step: 1

Number of matches won in 1987 = 35

Step: 2

Number of matches won in 1988 = 70

Step: 3

Number of matches won in 1989 = 45

Step: 4

Number of matches won in 1990 = 65

Step: 5

Total number of matches won by the USA from 1987 to 1990 = 35 + 70 + 45 + 65 = 215

Step: 6

So, the total number of matches won by the USA from 1987 to 1990 = 215.

Correct Answer is : 215

Step: 1

The height of each point on the scatter plot indicates the number of items of a particular cost bought by Lindsay.

Step: 2

From the graph, the number of items of costs $2, $4, $6, $8 and $10 are 3, 5, 3, 2 and 3 respectively.

Step: 3

The total amount spent by her is the sum of the products of the number of items and the cost of each item.

Step: 4

So, the total amount = $2 x 3 + $4 x 5 + $6 x 3 + $8 x 2 + $10 x 3

= 6 + 20 + 18 + 16 + 30 = $90

[Multiply number of items and cost of each item and add all.]

Step: 5

So, Lindsay spent $90 in the supermarket.

Correct Answer is : $90

Step: 1

The height of each point in the plot represents the population of a particular state in a particular year.

Step: 2

From the plot, the population of Alabama in the year 2000 is 2 million.

Step: 3

The population of California in the year 2000 is 8 million.

Step: 4

So, the population of California is higher than the population of Alabama in the year 2000.

[8 million is greater than 2 million.]

Correct Answer is : California

Step: 1

The height of each point in the scatter plot represents the number of teachers hired that year.

Step: 2

Number of teachers hired in the year 1983 = 410

Step: 3

Number of teachers hired in the year 1984 = 405

Step: 4

The difference between the number of teachers hired in 1983 and in 1984 = number of teachers hired in 1983 - number of teachers hired in 1984

= 410 - 405 = 5

[Substitute the values and simplify.]

Step: 5

So, 5 more teachers were hired in 1983 than the number of teachers hired in 1984.

Correct Answer is : 5

Step: 1

The height of each point in the scatter plot represents the number of working hours and the number of students working.

Step: 2

From the graph, the height of the point representing those who work 4 hours a day corresponds to the working hours of 30 students.

Step: 3

So, the number of students who work for 4 hours everyday is 30.

Correct Answer is : 30

Step: 1

The height of each point in the scatter plot represents the number of milligrams required at that particular age.

Step: 2

From the scatter plot, the height of the point corresponding to the age of the person when he or she is 50 is 10 mg.

Step: 3

So, 10 milligrams of vitamin D is required for a 50 year old person.

Correct Answer is : 10

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 was the highest in 2000.

Correct Answer is : 2000

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 is 25 million tons.

Step: 3

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

Correct Answer is : 10

Step: 1

Each point in the scatter plot represents the time taken to travel from City A to City B, at various speeds.

Step: 2

From the graph, the time taken by Annie at a speed of 40 miles per hour is 15 minutes.

Step: 3

The time taken by her at a speed of 60 miles per hour is 10 minutes.

Step: 4

Difference between the times = 15 - 10 = 5 minutes

Step: 5

So, Annie can save 5 minutes by traveling at a speed of 60 miles per hour than at a speed of 40 miles per hour.

Correct Answer is : 5 minutes

Step: 1

The height of each point in the plot represents the population of a particular state in a particular year.

Step: 2

From the plot, the population of Alabama in the year 1999 is 4 million.

Step: 3

The population of Alabama in the year 2002 is 8 million.

Step: 4

Increase in the population = 8 - 4 = 4 million

[Subtract 4 from 8.]

Step: 5

So, the percentage increase in the population = Increase Original x 100

= 4 4 x 100 = 100%

[Divide.]

Correct Answer is : 100%

Step: 1

In the scatter plot, the horizontal axis represents Charles'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 Charles when he was a particular age.

Step: 3

From the graph, the vertical distance of the point corresponding to 30 is 125.

Step: 4

So, the weight of Charles was 125 lb when he was 30 years old.

Correct Answer is : 125

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