Data Interpretation — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. A double bar graph shows two sets of data side by side for each category.
Double bar graphs display two related data sets together so you can compare them at a glance.
2. On a double bar graph, the key tells which color stands for which group.
The key explains which color or pattern represents each data set being compared on the graph.
3. If boys scored 18 and girls scored 22, the difference in scores is 4.
Subtracting eighteen from twenty two gives a difference of four points between the two groups.
4. A line graph that goes steadily up shows an increasing trend.
A line moving upward over time shows an increasing trend, meaning the value is rising consistently.
5. When a line on a graph stays flat, the value is constant.
A flat line shows the value is constant, neither rising nor falling, between the recorded points.
6. If sales were $80 last year and $120 this year, sales rose by $40.
Subtracting eighty from one hundred twenty gives forty, the increase in sales between the two years.
7. When two bars in a double bar graph are equal, the two groups have the same value.
Bars of equal height show the two groups recorded identical values for that category on the graph.
8. Plant growth recorded each day is best shown on a line graph.
Line graphs are ideal for showing how a single value, like plant height, changes over time.
9. If a bar reaches halfway between 30 and 40, its value is 35.
The midpoint between thirty and forty is thirty five, so the bar represents the value thirty five.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Compare boys and girls scores
→ Double bar graph
Double bar graph
Show temperature each hour
→ Line graph
Line graph
Show favorite snack counts
→ Single bar graph
Single bar graph
Show parts of a whole budget
→ Pie chart
Pie chart
Each graph type fits a different purpose, so the data goal decides which display works best.