Step-by-step explanation:
The percentages:
Lacrosse = 18%
Hockey = 68%
Swimming = 14%
Total percentages = 18% + 68% + 14% = 100%
Doing an illustration for the circle graph:
Draw a circle, divide it into 4 equal parts. The toatl percent is 100%.
100/4 = 25%. Each divided part is 25%.
Then we adjust the part to towards the percentage given.
Number of students that named sport hockey = 34
The percentage of sport hockey = 68%
Let the total number of students = y
Total number of students × percentage of sport hockey = Number of students that named sport hockey
y × 68% = 34
y × 0.68 = 34
y = 34/0.68
y = 50
Total number of students = 50