Rate of change is a mathematical term. Essentially, it means the ratio of difference in values of a variable during a time period to the actual length of the period.
proportional.
proportional tax
Direct labor rate variance is caused by a change in the hourly rate from what you initially planned.
proportional
regressive
I think you mean the "rate of CHANGE" of velocity. (If you don't, then the question is meaningless.) The rate of change of velocity is called " acceleration ".
Rate of change of the "vertical" variable in relation to the "horizontal" variable.
The change in y over the change in x
No
Do you mean, "rate of change of velocity"? That's called "acceleration".
if a number can change randomly it is called a variable
A rate of change in a variable Y, if not further qualified, is the change in Y for a unit change in time. However, the rate of change may be defined in terms of a unit change in some other variable (X). In graphical terms, the rate of change for a straight line is its gradient whereas for a curve, the rate of change at a point is the gradient of the tangent to the curve (if a tangent can be defined).
For continuous functions, yes.
It is the same as it is in calculus: Its the point on a curve where the rate of the rate of change of the curve flips.
The slope of the trend line is the rate of change of the data. It is the ratio of the change of the dependent variable to the rate of change of the independent variable. Slope represents the value of the correlation.
no its speed that definds the rate change of position
It is the rate of change of one variable with regard to another.