ALGEBRA 1 - LESSON 22

[22] True or False: A stem-and-leaf plot can help analyze change over time. If false, explain why.

• False because a stem-and-leaf plot is used to organize and order data, a line graph shows trends and changes in data over time.

• True

[22] Choose an appropriate graph to display the change in profit of a company over several years. Explain your choice.

• Line graph; line graphs show changes in data over time.

• Bar graph; bar graphs display numerical data

• Circle graph; circle graphs compare parts of the circle to the whole circle.

• Stem-and-leaf- plot; it is useful for organizing and ordering data.

[22] What can be inferred from the data? use a graph to reach your conclusion.

• The fastest lap times have generally decreased over the years.

• The fastest lap times are relatively the same over the years.

• The fastest lap times are equivalent in value to the year they are associated with.

• Nothing can be inferred about this data - sufficient data is needed to analyze it better.

[22] The table shows the number of threatened or endangered animal species as of July 22, 2007. What would a graph of the data show?

• It would compare the numbers of endangered animals by type for U.S. and other countries.

• It would display the total amount of endangered animals.

• It would show the change in amount of endangered animals through time.

• It would compare endangered animals to another.

[22] The table shows the number of threatened or endangered animal species as of July 22, 2007. What type of graph would display this data well?

• Double-Bar Graph

• Stem-and-leaf Plot

• Circle Graph

• Line Graph

[4] Wanchen is planting a garden the shape of a trapezoid in her yard. Use the diagram to find the area of her garden.

Mathematical Equivalence

ON

Mathematical Equivalence

OFF

[18]

Mathematical Equivalence

ON

[22] The circle graph shows the result of a poll on the sleeping habits of children ages 9–12. What portion of the children said they slept the recommended 9 1/2 to 10 1/2 hours for their age group? Express the answer as a decimal rounded to the nearest hundredth.

Mathematical Equivalence

ON

[INV 1] In a standard deck of cards, there are 13 cards in each of four suits: hearts, diamonds, clubs, and spades. Jose randomly draws a card from a deck and replaces it after each draw. His results are recorded in the table. Find the experimental probability of NOT drawing a club.

Mathematical Equivalence

ON