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Unit 6 - TEST

Last updated 2 months ago

35 Nsɛmmisa

1

The coaches of a group debate team answered a survey about hours of debate, team practice, and number of team wins.

The graph shows the results of the survey.

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1.

Describe the association seen on the scatterplot.

Strong Negative Association

Strong Positive Association

Weak Positive Association

No Association

Weak Negative Association

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4.

As the age of a car increases, its value decreases.
Which scatter plot best represents this relationship?
For each graph, value is the variable on the y-axis and car age is the variable on the x-axis.

(a)

(b)

(c)

(d)

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5a.

What type of association is indicated in the scatterplot?

(a) Positive

(b) No association

(c) Negative

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5b.

Based on these results, if a team practices 4 hours per week next season, which is the best estimate of the number of debates the team can expect to win?
Choose the BEST answer

(a) 1 debate

(b) 12 debates

(c) 16 debates

(d) 22 debates

Jasmine and her father planted a tree in their front yard 8 years ago. The scatterplot shows how the height of the tree increased each year.

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6a.

Which of the following most closely approximates the equation of the line of best fit for the data?
FEEL FREE TO DRAW A LINE OF BEST FIT IN THE SHOW YOUR WORK SPACE TO HELP YOU ANSWER THIS QUESTION!

A. y = -2x + 2

B. y = 2x + 2

C. y = -1/2x + 2

D. y = 1/2x + 2

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A 2-way table was created from the 9th graders and transportation survey.

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2.

Describe the association seen on the scatterplot.

No Association

Strong Negative Association

Weak Positive Association

Strong Positive Association

Weak Negative Association

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3.

Describe the association seen on the scatterplot.

Weak Negative Association

Strong Positive Association

Strong Negative Association

No Association

Weak Positive Association

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6b.

Talk about what the slope means in this problem!
Use the value in your explanation!

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6c.

Talk about what the y-intercept means in the problem!
Use the value in your explanation!

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7.

Use this space to fill the table first.

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14.

What percentage of 14 year-olds walk to school?
Enter a percentage like 50%. Round your answer to the nearest whole percentage.

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15.

What percentage of 15 year-olds walk to school?
Enter a percentage like 50%. Round your answer to the nearest whole percentage.

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16.

What percentage of students who walk to school are 15 year-olds?
Enter a percentage like 50%. Round your answer to the nearest whole percentage.

Students were asked to report their age and how many times a day they typically wash their hands.

Of the 738 13 year-olds, 66 said they wash their hands at most once a day, 583 said two to seven times per day, and 89 said eight or more times per day.

Of the 14 year-olds, 2 said they wash their hands at most once a day, 160 said two to seven times per day, and 42 said eight or more times per day.

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Use this space to fill that table first.

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30.

What percentage of those surveyed are 14 years old?
Enter a percentage like 70%. Round your answer to the nearest whole percentage.

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31.

What percentage of those who wash their hands 8 or more times per day are 13 year olds?
Enter a percentage like 70%. Round your answer to the nearest whole percentage.

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32.

What is the percentage that those who are 13 wash their hands 8 or more times a day?
Enter a percentage like 70%. Round your answer to the nearest whole percentage.