Quiz about Scatter Plots, Lines of Best Fit, Sampling

Question 1

What is the type of association?

Accepted Answer

no association

Answer

Negative

Answer

positive

Question 2

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books. Use the trend line to predict how many chapters would be in a book with 180 pages.

Accepted Answer

18 chapters

Answer

12 chapters

Answer

15 chapters

Answer

21 chapters

Question 3

What type of association does this graph have?

Accepted Answer

positive

Answer

negative

Answer

none

Answer

all of the above

Question 4

Which scatter plot shows a linear relationship between x and y?

Accepted Answer

Graph C

Answer

Graph A

Answer

Graph B

Answer

Graph D

Question 5

What would the correlation be between math grades and the time it takes to run a mile ?

Accepted Answer

No Correlation

Answer

Postive Correlation

Answer

Negative Correlation

Answer

Cannot Be Determined

Question 6

Which sentence describes the relationship shown on this scatter plot?

Accepted Answer

As the temperature increases, the number of visitors increases.

Answer

As the temperature decreases, the visitors increase.

Answer

As the visitors increase, the temperature decreases.

Answer

No correlation

Question 7

In the equation y=3x-5, what is the value of the y-intercept?

Accepted Answer

-5

Answer

3

Answer

-3/5

Answer

-2

Question 8

The graph shows a line of best fit for data collected on the amount of income earned by lawn companies in relation to the number of yards mowed.  What is the equation of the line of best fit?

Accepted Answer

y = 30x

Answer

y = (3/2) x

Answer

y = 30x + 300

Answer

y = (3/2)x + 300

Question 9

A teacher made the following graph showing absences vs. final grades.  Predict the grade of a student that has 7 absences.

Accepted Answer

60

Answer

45

Answer

50

Answer

70

Question 10

The graph above shows a line of best fit for data collected on the distance bicyclists have remaining in relation to the amount of time they have been riding.  What is the equation of the line of best fit?

Accepted Answer

y = -25x + 170

Answer

y = 25x + 170

Answer

y = -(5/8) x + 170

Answer

y = (5/8) x + 170

Question 11

1.  Carlos wants to know the favorite sport of people at his school so he asks his baseball team.

Accepted Answer

Biased

Answer

Unbiased

Question 12

7. A public library asked every 10th person who entered to name the type of book they were getting

Accepted Answer

Unbiased

Answer

Biased

Question 13

Which example shows CAUSATION?

Accepted Answer

An insect ate poison and it died.

Answer

Being happy and being a better student.

Question 14

Which example shows a CORRELATION?

Accepted Answer

Ice cream sales increase as temperature increases.

Answer

It rained and the ground is wet.

Question 15

If m=3 and b=6, what is the correct slope intercept equation?

Accepted Answer

y=3x+6

Answer

y=3-6

Answer

y=3x-6

Answer

y=6x+3

Question 16

About how many male math teachers were there in 2006?

Accepted Answer

35

Answer

15

Answer

30

Answer

45

Question 17

What type of correlation does this scatter plot show?

Accepted Answer

negative linear association

Answer

positive linear association

Answer

no association

Answer

nonlinear association

Question 18

If a scatterplot has no association then...

Accepted Answer

...its ordered pairs have no predictable pattern

Answer

...it has no ordered pairs

Answer

...it has ordered pairs that have a negative pattern

Answer

...if it makes a lion on a graph (roar!)

Question 19

In slope intercept form (y=mx+b) what is the "b"?

Accepted Answer

The y-intercept

Answer

The x-intercept

Answer

The slope (rate of change)

Answer

A point

Scatter Plots, Lines of Best Fit, Sampling

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