Question

a high school basketball coach counted the number of points her team scored each game.
points per game
stem | leaf
1 | 9
2 | 2
3 | 5
4 |
5 | 3 4 6 9
6 | 1 3 7 8
7 | 0 1 4 7
8 | 0 4 6 7 8
9 | 0
how many games had exactly 70 points?

Explanation:

Step1: 理解茎叶图

茎叶图中，茎（Stem）代表十位数字，叶（Leaf）代表个位数字。要找得分为70的比赛场数，需看茎为7时，叶为0的情况。

Step2: 查看茎为7的叶

茎为7时，叶的部分有0、1、4、7。其中叶为0的情况对应分数70，这里叶为0的出现次数为1次。

Answer:

1