Splash Screen Chapter 11 Lesson 11-2

A.A B.B C.C D.D (over Lesson 10-7) A.–2v 8 z 13 B.–2v 15 z 40 C.–32v 8 z 13 D.–32v 15 z 40 Simplify (–2v 3 z 8 ) 5.

1.A 2.B 3.C 4.D A.–20x –8 x 15 B.–20x 7 C.32,000x 7 D.–32,000x 7 Simplify (4x –2 ) 4 (–5x 5 ) 3. (over Lesson 10-7)

1.A 2.B 3.C 4.D A.(3a 2 b 4 ) 3 B.(3a 3 b 9 ) 3 C.(9a 2 b 4 ) 3 D.(9a 4 b 10 ) 2 Which of the following has the same value as (27a 6 b 12 )? (over Lesson 10-7)

A.A B.B C.C D.D Simplify 5a 2 (7a 4 ). Express using positive exponents. (over Chapter 10) A.35a 6 B.12a 6 C.35a 8 D.12a 8

histogram Display and interpret data in a histogram.

Standard 7SDAP1.1 Know various forms of display for data sets, including stem-and-leaf plot or box- and-whisker plot; use the forms to display a single set of data or to compare two sets of data.

Forever you were taught that this was called a “Bar Graph”. Forget about it! From this point on they are to be called a “Histogram”

Construct a Histogram FOOD The list below shows the number of grams of caffeine in certain types of tea. Use intervals 1–20, 21–40, 41–60, 61– 80, and 81–100 to make a frequency table. Then construct a histogram.

Construct a Histogram Place a tally mark for each value in the appropriate interval. Use intervals 1–20, 21–40, 41–60, 61–80, and 81–100 to make a frequency table. Then add up the tally marks to find the frequency for each interval.

Step 1Draw and label a horizontal and vertical axis. Step 2Show the intervals from the frequency table on the horizontal axis. To construct a histogram, follow these steps: Include a title.

Construct a Histogram Answer: Step 3For each caffeine interval, draw a bar whose height is given by the frequency.

Analyze and Interpret Data WEATHER How many months had 6 or more days of rain? Three months had 6 to 7 days of rain, and one month had 8 to 9 days of rain. Answer: Therefore, or 4 months had 6 or more days of rain.

Analyze and Interpret Data WEATHER How many months had exactly 2 days of rain? Answer: This cannot be determined from the data presented in this graph. The histogram indicates that there were 3 months that had 2 or 3 days of rain, but it is impossible to tell how many months had exactly 2 days of rain.

FOOD The frequency table below shows the amount of caffeine in certain drinks. Draw a histogram to represent the data. Answer:

1.A 2.B 3.C 4.D A.2 months B.3 months C.4 months D.5 months WEATHER How many months had 6 or more days of snow?

1.A 2.B 3.C 4.D A.1 month B.2 months C.6 months D.cannot be determined WEATHER How many months had exactly 6 days of snow?