Final answer:
The question pertains to analyzing sales data, survey results, and using statistical tools to interpret and predict outcomes based on collected data, which would fall into the realm of high school-level Mathematics.
Step-by-step explanation:
The subject of the question centers around the interpretation of statistical data, specifically related to sales records, survey responses, and histograms. It encompasses different ways of collecting data and analyzing it using statistical tools like frequency polygons, time series graphs, and predictions based on regression models. For high school students, typically within a statistics or business math class, these types of questions help develop skills in data analysis and interpretation essential for real-world applications such as market research and sales forecasting.
For example, the exercise about predicting sales on day 60 and day 90 using a given regression model, š = 101.32 + 2.48x, requires understanding of linear equations and how to apply them for predictive analysis. This involves substituting the 'x' value in the equation with the given day and calculating the projected sales. Such exercises solidify a student's analytical and problem-solving skills in mathematics.