Stem-and-leaf plots
The question
How many values does the plot show?
How many values does the plot show?
How it works.
1 | 5=15
15, 19, 20, 23, 23, 23, 27, 31, 34, 38, 42, 46
leaves:12
12
- 01
Read the key first. Each leaf is one digit added onto its stem, so the 1 row with a 5 on it means 15 .
- 02
So the plot lists every value, in order: 15, 19, 20, 23, 23, 23, 27, 31, 34, 38, 42, 46.
- 03
Count the leaves, not the rows. There are 4 rows and 12 leaves altogether.
- 04
So the answer is 12 minutes.