A scatter plot was created to show the relationship between the number of staff members and students at various schools. The scatter plot's trend line has an equation of y = 0.1x + 18, where y is the total number of staff members and x is the total number of students.

Question

Use the equation to predict the number of students in a school with 120 staff members.

890 students

1,038 students

30 students

1,020 students

Answer 1

To predict the number of students in a school with 120 staff members, we can plug x=120 into the equation y = 0.1x + 18.

y = 0.1(120) + 18
y = 12 +18
y = 30

Therefore, the predicted number of students in a school with 120 staff members is 30.

So, the correct answer is 30 students.