This data table, developed by Marta, shows some numbers related to students from different high schools in one county in Texas. By studying the numbers and arranging the data in different ways, Marta can see the story that these numbers tell about the county's students and their plans for college.
Marta can use a line graph to determine a relationship between the percentage of students who passed algebra and the percentage of students with college plans. As a general pattern, the higher the percentage of students who passed algebra, the higher the percentage with college plans. Some of the schools do not fit the pattern. Look at the two points at the beginning of the of the graph at left. In both high schools #3 and #9, none of the students passed algebra, but high school #3 has a higher percentage of students with college plans than several other high schools with higher passing percentages. High school #5 and high school #10 have lower percentages of students with college plans than several other schools.
This multiple bar graph can be used to compare the percentage of students who passed algebra to the percentage of twelfth graders who had ever been economically disadvantaged. High school #10 has the highest percentage of students who passed algebra and the lowest percentage of students who had ever been economically disadvantaged. High school #9 has the highest percentage of disadvantaged students and none of these students passed algebra. Notice that when the orange bars tend to be high, the pink bars tend to be low. Do you see any schools where this trend is not as dramatic as the other schools?