Final answer:
After setting up a proportion based on the survey results (7 out of 9 students) and cross-multiplying, we find that 252 students at Harmony believe teachers do not assign enough homework.
Step-by-step explanation:
To find out how many students at Harmony believe teachers do not assign enough homework, we will use the proportional ratio derived from the survey results. According to the survey, 7 out of 9 students believed there was not enough homework. We can set up a proportion to solve for the number of students this corresponds to in a school of 324 students.
The steps are as follows:
- First, express the ratio of students who believe there is not enough homework to total students from the survey as 7/9.
- Next, set up a proportion where 7/9 equals x/324, where x represents the number of students at Harmony who feel the same way.
- To solve for x, cross-multiply and divide: (7 * 324) / 9 = x.
- After calculating, x = 252.
Therefore, 252 students at Harmony think teachers do not assign enough homework, which corresponds to option c. 252.