Graphs and Data — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. A class voted on pets: cats 8, dogs 3, fish 6, birds 2, hamsters 9, turtles 4. How many students were surveyed?
A) 28
B) 30
C) 32
D) 34
Adding every group gives 8 + 3 + 6 + 2 + 9 + 4 = 32. The total number surveyed is always the sum of all the categories.
2. Using the same data, how many more students chose hamsters than dogs?
A) 3
B) 5
C) 6
D) 9
Hamsters had 9 votes and dogs had 3, and 9 - 3 = 6. The difference between two groups is found by subtracting the smaller from the larger.
3. Which two pets together equal the same as hamsters alone (9 votes)?
A) cats and birds
B) dogs and fish
C) dogs and turtles
D) birds and turtles
Dogs (3) plus fish (6) makes 9, which matches the hamsters' total. The other pairs add up to 10, 7, or 6, so they don't match.
4. A tally mark group of four lines with one diagonal through them stands for what number?
A) 4
B) 5
C) 6
D) 10
A full tally group is four upright marks crossed by a fifth diagonal line, which together stand for 5. Tally marks are bundled into groups of five to make counting easier.
Part B: Fill in the Blank
Write the correct answer on each line.
1. Fish and turtles together got 10 votes.
Fish got 6 votes and turtles got 4, and 6 + 4 = 10. Adding the two counts gives the combined total.
2. The pet that got exactly 6 votes is fish.
Looking at the data, fish are the only pet that received exactly 6 votes. The other pets all have different totals.
3. Cats got 6 more votes than birds.
Cats had 8 votes and birds had 2, and 8 - 2 = 6. Subtraction shows how many more one group has than another.
4. The key on a pictograph tells what each picture stands for.
The key on a pictograph is the legend that explains the symbols. It tells the reader what number each picture stands for.
5. If each picture means 2 and you see 4 pictures, the total is 8.
If one picture means 2, then 4 pictures mean 4 × 2 = 8. You multiply the value of each picture by how many pictures there are.