的意思 valid function

1. The mathematical equation is not a valid function because it does not pass the vertical line test.
这个数学方程不是一个有效的函数，因为它没有通过垂直线测试。

2. In order to determine if a function is valid, you must check if it has a unique output for every input.
为了确定一个函数是否有效，你必须检查它是否对每个输入有唯一的输出。

3. The software developer wrote a valid function to calculate the total sales for the month.
软件开发人员编写了一个有效的函数来计算本月的总销售额。

4. It is important to test your code to ensure that all functions are valid and working correctly.
重要的是要测试你的代码，确保所有函数都是有效的并且正常运行。

5. The student was able to prove that her hypothesis was correct by creating a valid function to model the data.
这位学生通过创建一个有效的函数来模拟数据，证明了她的假设是正确的。

6. The professor explained that in order for a function to be valid, it must satisfy both the domain and range requirements.
教授解释说，一个函数要有效，必须满足定义域和值域的要求。