Educational guide on frequency polygons for 7th and 8th graders, explaining how to create a frequency polygon from a histogram with examples and a graph.
A colorful educational poster titled "Helping With Math" featuring a frequency polygon explanation, suitable for 7th and 8th-grade students aged 11-13. The poster includes a table with data on spending intervals, frequency, midpoints, and total class values, along with a line graph illustrating the frequency polygon. Icons include a lightbulb, crossed pencils, and a schoolhouse.