Directions: You probably see them in the news all the time—predictions about

prices, jobs, stocks, and other aspects of the economy. Now it’s your turn to predict

the future! Follow the directions to make and explain an economic prediction for an

article you have been asked to write in the Economic News.

1. Choose one item of interest to you in the Historical Pricing Chart on the next

page.

2. Calculate the percent of change of the item’s price each decade, and use

your results to determine the average rate of change from 1960–2000.

3. Comment on the trend in your item’s percent of increases.

4. Go shopping! Find the average current price of your item online, in the

newspaper, or locally by looking at the price when you go to the store in the

next day or two. Does the current price match the trend from 1960–2000

that you identified? Explain your thinking.

5. Create a line graph or other visual model to show the pricing trend. Be sure

to include the current price in your model.

6. Predict the item’s price at a future date. Use your calculations and visual

model to justify your prediction.

7. Organize your analysis, prediction, explanations, and visual model in a brief

news article. Your completed article will be submitted as your portfolio

assessment

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portfolio_pg1_u6_percent_predictions_portfolio___modified.docx

portfolio_u6_percent_predictions_portfolio_modified_template_part_2.docx

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Percent Predictions Portfolio Template: MY EXAMPLE FOR YOU TO FOLLOW

Applications of Percent

1. Choose one item of interest to you from the Historical Pricing Chart on the Portfolio Worksheet found

in your lesson. (1 point)

YOU CANNOT USE THE MOVIE TICKET AS I AM DOING IT AS AN EXAMPLE FOR YOU. I HAVE ALSO DONE AN

EXAMPLE TO THE GRAPH. Blank sheet for you to fill out is also attached.

Item

Movie

Ticket

1960 Price

.69

1970 Price

1.55

1980 Price

2.60

1990 Price

4.23

2000 Price

5.39

2. Calculate the percent of change of the item’s price each decade, and use your results to determine the

average rate of change from 1960-2000. Please show your work. (8 points)

Decade

Work and

Answers →

% of Change

1960-1970

.69-1.55

.69

=1.246

=125%

% of Change

1970-1980

1.55-2.60

1.55

=.677

=68%

% of Change

1980-1990

2.60-4.23

2.60

=1.63

=163%

% of Change

1990-2000

4.23-5.39

4.23

=.274

=27%

Average % of

Change

125+68+163+27

4

=383/4= 95.75

=96%

3. Give your comments on the trend in your item’s percent of increases. Is the percent of increase

constant? If yes, why? If no, why not? (2 points)

4. What is the average current price of your item? Please cite your source. (1 point)

5. Create a line graph or bar graph to show the pricing trend. Be sure to include the current price in your

model. (2 points) See Below. You can do this graph by hand- take a picture of it or scan it- so you can

put it in the drop box.

P

R

I

C

E

Movie Prices from 1960 to 2010

6

5

O

F

A

M

O

V

I

E

4

3

Series1

2

1

0

19601

19702

3

1980

19904

20005

6. Predict the item’s price at a future date. Use the date 2030. Please show your work. Use math

calculations to justify your prediction. (2 points)

Percent Predictions Portfolio Template: MY EXAMPLE FOR YOU TO FOLLOW

Applications of Percent

1. Choose one item of interest to you from the Historical Pricing Chart on the Portfolio Worksheet found in

your lesson. (1 point)

YOU CANNOT USE THE MOVIE TICKET AS I AM DOING IT AS AN EXAMPLE FOR YOU. I HAVE ALSO DONE AN

EXAMPLE TO THE GRAPH. Blank sheet for you to fill out is also attached.

Item

1960 Price

1970 Price

1980 Price

1990 Price

2000 Price

2. Calculate the percent of change of the item’s price each decade, and use your results to determine the

average rate of change from 1960-2000. Please show your work. (8 points)

Decade

% of Change

1960-1970

% of Change

1970-1980

% of Change

1980-1990

% of Change

1990-2000

Average % of

Change

Work and

Answers →

3. Give your comments on the trend in your item’s percent of increases. Is the percent of increase

constant? If yes, why? If no, why not? (2 points)

4. What is the average current price of your item? Please cite your source. (1 point)

5. Create a line graph or bar graph to show the pricing trend. Be sure to include the current price in your

model. See Below. (2 points) You can do this graph by hand- take a picture of it or scan it- so you can

put it in the drop box.

6. Predict the item’s price at a future date. Use the date 2030. Please show your wor. Use math

calculations to justify your prediction. (2 points)

…

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