Final answer:
To estimate the number of students in the class who walk to school, multiply the total number of students (30) by the percentage of walking students (60%). The proportion can be written as Walking students/Total students = 60/100. Solving the proportion, we find that 18 students walk to school, which is reasonable.
Step-by-step explanation:
a) To estimate the number of students in the class who walk to school, you can multiply the total number of students in the class (30) by the percentage of students who walk to school (60%).
Estimated number of students who walk to school = 30 x 0.60 = 18 students.
b) To write a proportion, you can set up the following equation: Part/Whole = Percent/100 where the part is the number of students who walk to school, the whole is the total number of students in the class, and the percent is the percentage of students who walk to school.
Walking students/Total students = 60/100
c) To solve the proportion, you can cross multiply and solve for the unknown variable (x).
Walking students x 100 = Total students x 60
x = (Total students x 60) / 100
Substituting the value of total students (30), we get:
x = (30 x 60) / 100 = 18 students.
Checking our answer, we can see that the estimated number of students who walk to school (18) is reasonable.