Q:
# What is a direct formula?

A direct formula is a formula that represents the proportionate change of two variables in the same direction such that when one variable increases/decreases the other variable also increases/decreases. The direct variation formula is a direct formula that maps two variables using a constant of variation.

Continue Reading
Credit:
david franklin
E+
Getty Images

The direct variation formula is written as y = kx; where, k is the constant of variation and y and x are the variables. The graph of the direct variation formula is a straight line in cases where the constant of variation is greater than zero. An example of a direct variation formula is the formula for the area of a circle.

Learn more about Numbers-
Q:
## What is a mathematical concept?

A: A mathematical concept is a general idea behind an equation, problem or formula in math. In contrast to a math fact, which must be committed to memory, a m... Full Answer >Filed Under: -
Q:
## What is the formula for subtracting VAT?

A: The formula for subtracting value added tax, or VAT, from the price of an item is (price of the item)/(VAT+1). If an item costs $9.99 and VAT is 15 percent... Full Answer >Filed Under: -
Q:
## What is a carrying capacity formula?

A: The carrying capacity formula is a mathematical expression for the theoretical population size that will stabilize in an environment and can be considered ... Full Answer >Filed Under: -
Q:
## What is the formula for finding speed?

A: The general formula for finding speed is x = d / t, where "x" denotes the speed, "d" indicates the distance traveled and "t" represents the time it takes t... Full Answer >Filed Under: