Which of the following are types of variations? Direct
Inverse
Variable
Combined
Joint

Step-by-step explanation:

There are many different types of variations  as follows:

1) Direct variations in which the relationship between two different variables is direct.

2) Inverse variations in which the relationship between two different variables is opposite.

3) Joint variations in which the relationship between one variable varies directly with the product of two or more variables.

4) Combined variations in which one variable is directly proportion to second variable but inversely proportion with third variables.

option 'A', 'B', 'D' , 'E' are correct.

answer: i think its b