standard_description: Understand that positive and negative numbers are used together to describe quantities having opposite directions or values (e.g., temperature above/below zero, elevation above/below sea level, credits/debits, positive/negative electric charge); use positive and negative numbers to represent quantities in real-world contexts, explaining the meaning of 0 in each situation.
problem_activity: A city planner for a neighborhood of Boston is trying to determine if a new park should be built in the neighborhood. She goes around the neighborhood, knocking on doors, asking, “How many children under the age of 7 live in this household?” The data she collected from 28 households is shown in the frequency table below.
| **           # of children under 7 years old in the household          ** | **           Frequency          ** |
|---------------------------------------------------------------------------|------------------------------------|
|                                     0                                     |                 9                  |
|                                     1                                     |                 6                  |
|                                     2                                     |                 8                  |
|                                     3                                     |                 4                  |
|                                     4                                     |                 0                  |
|                                     5                                     |                 1                  |
a.   Create a dot plot to represent the data. Describe your dot plot in words.
b.   What number would you use to represent the center of the data? Explain why you chose that number.
c.   Based on the data, what would you recommend to the city planner about the new park? Does this neighborhood seem like a good place to put the new park? Explain why or why not using the data.


aligns: no