Final answer:
According to the survey, approximately 35 students are likely to vote for Madelyn.
Step-by-step explanation:
To estimate how many people will likely vote for Madelyn based on the survey, we can create a proportion using the information provided. Let's set up the proportion:
15 (number of students planning to vote for Madelyn) / 60 (total number of students surveyed) = x (number of students likely to vote for Madelyn) / 140 (total number of seventh-grade students)
Solving the proportion, we find:
x = (15/60) * 140 = 35
So, according to the survey, approximately 35 students are likely to vote for Madelyn.