Question

the frequency polygon below shows the results of a survey that tracked the flu cases reported by college health services over a 12 - week period.
in which week did the number of reported flu cases start declining?
week 1
week 3
week 6
week 7
week 12
suggested tutorial: learn it: interpret information represented in a frequency polygon.
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Explanation:

Step1: Understand the frequency polygon

A frequency polygon shows the trend of data over a period. In this case, the x - axis is weeks and the y - axis is the number of students diagnosed with flu.

Step2: Analyze the trend

We look for the point where the graph stops increasing and starts decreasing. Before week 6, the number of flu cases is increasing. At week 6, it is at a maximum. After week 6 (i.e., starting from week 7), the number of flu cases begins to decline.

Answer:

week 7