1) The number of X's on the line plot is the number of students surveyed. Therefore, the answer is 15.
2) First we need to figure out which fractions are greater 1/2. We know that 1/8, 1/4, and 1/2 are not greater than 1/2. Now let's determine the remaining fractions. The fraction 3/8 is less than 1/2 because 1/2 with a denominator of 8 would be 4/8. That means 3/8 is 1/8 smaller. Using that same logic, we know that 5/8, 7/8, and 3/4 are all greater than 1/2. So count the number of X's both the fractions 5/8, 7/8, and 3/4. The answer is 7.
3) The greatest distance is 7/8 miles.
4) Count the X's. The answer is 8.
5) The fraction 3/4 is greater than 1/2, so tally up the X's above 1/2 and 3/4. The answer is 5.
6) We have 3 bags that weigh 1/4, 3 bags that weigh 1/2, and 2 bags that weight 3/4. So multiply the weights by the respective quantity and add the weights up.
3/4 + 3/2 + 6/4
Find the common denominator. A denominator of 4 works, so multiply the numerator and denominator of 3/2 by 2.
3/4 + 6/4 + 6/4 = 15/4 lbs
Lastly, convert the weight to a mixed number.
The answer is 3 and 3/4 (choice D).