Chapter 5 look for a pattern
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Chapter 5 look for a pattern l.jpg

Chapter 5:

Look for a Pattern


Slide2 l.jpg

While jogging, Shawna noticed that dogs would hear her and bark. After the first dog had barked for about 15 seconds, two other dogs would join in and bark. In about another 15 seconds, it seemed that each barking dog would “inspire” two more dogs to start barking. Of course, long after Shawna passed the first dog, it continued to bark, as dogs are inclined to do. After about 3 minutes, how many dogs were barking (as a result of Shawna's passing the first dog)?


Try ideas l.jpg
Try ideas. bark. After the first dog had barked for about 15 seconds, two other dogs would join in and bark. In about another 15 seconds, it seemed that each barking dog would “inspire” two more dogs to start barking. Of course, long after Shawna passed the first dog, it continued to bark, as dogs are inclined to do. After about 3 minutes, how many dogs were barking (as a result of Shawna's passing the first dog)?


Write down a sequence l.jpg

1 dog bark. After the first dog had barked for about 15 seconds, two other dogs would join in and bark. In about another 15 seconds, it seemed that each barking dog would “inspire” two more dogs to start barking. Of course, long after Shawna passed the first dog, it continued to bark, as dogs are inclined to do. After about 3 minutes, how many dogs were barking (as a result of Shawna's passing the first dog)?

1 + 2 = 3 dogs

3 + 6 = 9 dogs

Write down a sequence.


Make a chart l.jpg
Make a chart. bark. After the first dog had barked for about 15 seconds, two other dogs would join in and bark. In about another 15 seconds, it seemed that each barking dog would “inspire” two more dogs to start barking. Of course, long after Shawna passed the first dog, it continued to bark, as dogs are inclined to do. After about 3 minutes, how many dogs were barking (as a result of Shawna's passing the first dog)?


Calculate differences l.jpg
Calculate differences. bark. After the first dog had barked for about 15 seconds, two other dogs would join in and bark. In about another 15 seconds, it seemed that each barking dog would “inspire” two more dogs to start barking. Of course, long after Shawna passed the first dog, it continued to bark, as dogs are inclined to do. After about 3 minutes, how many dogs were barking (as a result of Shawna's passing the first dog)?

+ 2

+ 6

+ 18

+ 54


Try other operations as needed l.jpg
Try other operations bark. After the first dog had barked for about 15 seconds, two other dogs would join in and bark. In about another 15 seconds, it seemed that each barking dog would “inspire” two more dogs to start barking. Of course, long after Shawna passed the first dog, it continued to bark, as dogs are inclined to do. After about 3 minutes, how many dogs were barking (as a result of Shawna's passing the first dog)?as needed.

x 3

x 3

x 3

x 3


Describe the pattern with symbols l.jpg
Describe the pattern bark. After the first dog had barked for about 15 seconds, two other dogs would join in and bark. In about another 15 seconds, it seemed that each barking dog would “inspire” two more dogs to start barking. Of course, long after Shawna passed the first dog, it continued to bark, as dogs are inclined to do. After about 3 minutes, how many dogs were barking (as a result of Shawna's passing the first dog)?with symbols.


Strategy look for a pattern l.jpg
Strategy: Look for a pattern bark. After the first dog had barked for about 15 seconds, two other dogs would join in and bark. In about another 15 seconds, it seemed that each barking dog would “inspire” two more dogs to start barking. Of course, long after Shawna passed the first dog, it continued to bark, as dogs are inclined to do. After about 3 minutes, how many dogs were barking (as a result of Shawna's passing the first dog)?

  • Write down the sequence, and extend it if you can.

  • Make a chart.

  • Calculate differences.

  • Try other operations as needed.

  • Describe the pattern with symbols.