Worked examples
Two examples
Example 1
A line graph goes from 60 in March to 45 in April. What was the change?
- New minus old: 45 − 60.
- A decrease is negative.
Answer: −15
Example 2
What was the value in March?
- Find March along the bottom, go up to the point, read across.
Answer: 60
Where this is taught: Quiz 38: Reading Graphs, “Line graphs: change over time”
The drill
Ten problems
How many:
Type each answer, then press Check my answers at the bottom. Commas in large numbers are fine.Write each answer on the line. The answer key, with the reasoning, is on the last page.