The table and scatterplot show the average heights of girls at different ages. Average Heights of Girls
Age (years) Height (inches)
0 20.0
2 34.5
4 41.0
6 46.0
8 50.5
10 54.5

The variable x represents age, in years, and y represents height, in inches. According to the scatterplot, which equation best represents the relationship between age and height?

Group of answer choices

y = 0.3x - 7

y = 0.4x - 12

y = 2.5x + 30

y = 3.2x + 25

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Question 21 pts
A U. S. businesswoman visited South Korea. Because the currency exchange rate can vary daily, she recorded the conversion amounts every time she exchanged money. The table shows the points she plotted on a scatterplot.

Exchange Values
U. S. Dollars Korean Won
100 106,500
250 268,750
500 535,000
700 770,000
1,000 1,050,000

To estimate her typical exchange rate, which equation best fits the line between w, Korean Won, and d, U. S. Dollars?

Group of answer choices

w = 535,000

w = 1,700d + 1,048

w = 1,058d + 6,257

w = 1,081d - 55,750

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Question 31 pts
The motion of an object was recorded by measuring the velocity of the object in meters per second at various times, as shown in the table.

Motion of an Object
Time
(seconds) Velocity
(meters per second)
0 6.1
2.1 12.2
5.3 17.4
8.2 26.4
10.0 28.1
12.1 32.8

The scatterplot below was graphed from the data in the table, where t represents the time, and v represents the velocity.

Based on the scatterplot, which equation best represents the relationship between velocity and time?

Group of answer choices

v = 2.19t + 6.7

v = 2.24t + 5.7

v = 2.71t + 6.1

v = 2.90t + 6.1

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Question 41 pts
Lisa collected data on the grams of fat and the grams of carbohydrates in 10 sandwiches at a popular restaurant. The table below represents the data she recorded.

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Group of answer choices

y = 0.5x + 23

y = 23x + 0.5

y = 1.5x + 27

y = 27x + 1.5

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Question 51 pts
For an experiment on evaporation, Ginny filled a water tank. She then measured the level of the water several times to see how much had evaporated. The table below shows the number of centimeters below the top the water was at each given number of days where x represents the number of days and y represents the number of centimeters.

DKMathCA3452_1

What is the slope of the line representing the rate of evaporation?

Group of answer choices

-19

-12

-6

-5