4. Which of the following is a variable in the data table above? (1 point)
previous salary
years of experience
years of higher education
average salary
![4 Which of the following is a variable in the data table above 1 point previous salary years of experience years of higher education average salary class=](https://us-static.z-dn.net/files/dd6/63ad9826be18e614f52f726c113ac1a3.png)