Free Printable College Algebra Week 3: Scatter Plots and Linear Regression

Worksheets

College Algebra Week 3: Scatter Plots and Linear Regression

Total questions: 19

Worksheet time: 38mins

Name

Class

Date

What is a scatter plot?

A graph that shows the relationship of two data sets.

A graph drawn using rectangular bars to show how large each value is.

A graph that shows information that is connected in some way.

A graph that shows data changing over time.

If a scatterplot has no association then...

...it has no ordered pairs

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

...its ordered pairs have no predictable pattern

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

In a scatterplot, an outlier...

...is something we didn't learn 8th grade

...is a puppet with a long nose named Pinocchio

...is a point that is far outside the main cluster of points/ordered pairs

...is a really naughty point who doesn't tell the truth when outside

You are analyzing a scatter plot that has a negative correlation. What is true of the of the x and y values?

As x increases, y decreases

As x increases, y increases

As x decreases, y decreases

What is a line of best fit used for?

To make predictions

To make the graph look pretty

To connect the points

To make it look like you know what you are doing

Label the type of association shown by the scatter plot as positive, negative or none.

positive

negative

none

Label the type of association shown by the scatter plot as positive, negative or none.

positive

negative

none

Which best describes the association shown in the scatter plot below?

Negative and linear

Negative and non-linear

Positive and linear

Positive and non-linear

Which best describes the form of this scatterplot?

linear

nonlinear

scattered

10.

Which scatter plot(s) could be used to show the relationship between a person’s age and the number of syllables in a person’s first and last name?

11.

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 pages would be in a book with 6 chapters.

100 pages

170 pages

60 pages

20 pages

12.

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 140 pages.

12 chapters

19 chapters

14 chapters

21 chapters

13.

Mrs. Collins made a scatterplot to show the relationship between the number of absences and a student’s final exam score. Based on this scatterplot, a student with 6 absences should get approximately what score on the final exam?

14.

The linear regression equation for the data is y = 1.5x + 12. Interpret the slope of the equation.

The slope is (0, 1.5). It means that a pizza with 0 toppings will cost $1.50.

The slope is 1.5. It means that it costs $1.50 per topping.

There are 1.5 toppings.

There are 1.5 pizzas.

15.

Is this line an accurate line estimate of best fit for the data?

Yes

16.

Is this line an accurate line estimate of best fit for the data?

Yes

17.

What is the equation of the line of best fit?

y = -25x + 170

y = -5/8x + 170

y = 25x + 170

y = 5/8x + 170

18.

What is the line of best fit?

y = 5/3x + 375

y = 1/3x + 475

y = 5/3x + 3

y = 1/3x + 375

19.

The scatter plot below shows the number of books read by students in Mrs. Hall’s English class and their final grades. Which statement represents the best description about the line of best fit?

The more books students read, the lower their English grade.

The more books students read, the higher their English grade.

The fewer books students read, the higher their English grade.

No relationship exists between the number of books students read and their English grades.

100 %

College Algebra Week 3: Scatter Plots and Linear Regression

Total questions: 19

Worksheet time: 38mins

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