what are the two kinds of variable
It is a qualitative variable.
It is the kind of variable that you purposely change.
It is the kind of variable that you purposely change.
variable
the variable that is most difficult to test
Line Graph
independent
The control is what you're washing, amount of dirt, kind of dirt, temperature of water. The kind and amount of soap are variables, although when using the same kind in different amounts, the kind is control. The temperature of water is also control and variable depending on the test.
the y variable always changes and x is constant
Yes it can, but it depends on what kind of variable and how it relates to the whole number.
A constant expression.
Neither 100 nor 16.6 is a variable of any kind.