TEKS - 9.AL1.2.d - 1

If y vaires directly with x and y= 12 when x= 15. What is the value of x when y= 16?

• 12.8

• 20

• 11.25

• 19

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AI.9.2.D

If y = 15 when x = 12 find y when x = 32.

• 40

• -40

• 5

• -5

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AI.9.2.D

The scatterplot shows the relationship between the number of baseballs used in 14 games and the number of pitches thrown in these games.

Based on the scatterplot, what is the best prediction of the number of baseballs that will be used if 275 pitches are thrown?

• 150

• 60

• 100

• 160

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AI.9.2.D

Trina's paycheck earnings varies directly as the number of hours she works. If she works 19 hours and earns $187.15, what should she earn if she worked 40 hours?

• $394

• $440

• $472.80

• $512.20

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AI.9.2.D

The value of y varies directly with x. If

x = 3, then y = 21. What is the value of x when y = 105?

• $\frac{3}{5}$

• $1\ \frac{2}{3}$

• 7

• 15

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AI.9.2.D

The value of y varies directly with x. If x = 3, then y = 21. What is the value of x when y = 105?

• ⅗

• 1⅔

• 7

• 15

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AI.9.2.D

The scatterplot shows the number of visitors to a beach each day and the high temperature in degrees Fahrenheit for that day.

Based on this scatterplot, which statement appears to be true?

• There is a nonlinear correlation between the high temperature and the number of visitors to the beach.

• When the high temperature is above 100°F, fewer than 150 visitors are expected at the beach.

• There is no correlation between the high temperature and the number of visitors to the beach.

• When the high temperature is between 75°F and 90°F, more than 120 visitors are expected at the beach.

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If y =4 when x = -4, find y when x =7.

• 7

• -4

• -7

• 4

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In a direct variation, y=39 when x=3. Find the value of y when x=2.

• 26

• 3

• 58.5

• 2

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Which of the situations below represents a non-proportional relationship?

• total distance traveled and number of hours traveled, if John drove his car at a constant rate of 60 miles per hour for 2 hours

• total earnings and number of hours spent babysitting, if Carrie babysat for 4 hours at a rate of $8 per hour

• total fees charged and number of carpeted rooms cleaned, if a carpet cleaning company charges $40 for the first room and $25 for each additional room

• total savings and number of weeks spent saving, if Jeremy saved $10 each week for 6 weeks

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