Algebra-1

Question Analysis
This question involves finding a missing frequency in a frequency table, using the total number of observations (students surveyed).
The main focus is on applying the property that the sum of all frequencies equals the total number of data points.

Key Concept Explanation
Missing Frequency Calculation: When the total number of observations is known, the missing frequency of a category can be found by subtracting the sum of the known frequencies from the total.

Step-by-Step Solution
Recall that total frequency = sum of all individual frequencies = number of students surveyed (15).
Let the missing frequency (for 1 pet) be x.
Set up the equation: 6 (0 pets) + x (1 pet) + 4 (2 pets) = 15.
Solve for x:

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