www.reference.com/article/constant-variation-cb00f5348d527795

The constant of variation is a number that relates two variables that are directly proportional to one another. The number represents a fixed ratio between the two variables, describing how they correspondingly increase or decrease. Constants of variation cannot be calculated for linear expressions

www.reference.com/article/direct-variation-1def427678cd9cb7

The term "direct variation" refers to a mathematical correlation between two variables where one variable can be represented as a constant multiple of the other unknown quantity. It is also known as a "direct proportion."

www.reference.com/world-view/real-world-examples-direct-variations-cd954306a5ec6323

Direct variation exists when a worker is paid based on the number of hours worked. Another example of a direct variation is a taxi fare that varies according to the distance traveled. Direct variation occurs with two variables when the ratio of their values always remains the same. For example, if t

www.reference.com/article/direct-variation-formula-3b04e36c4c6efd42

The general formula for direct variation is k equals y divided by x. In this formula, k is a constant quantity and x and y are variables. K is also called the constant of variation, because it stays the same even as x and y vary.

www.reference.com/article/direct-variation-graph-f4cdc15dcd084f87

A direct variation graph represents a situation in which two variables increase or decrease at the exact same rate. The line on the graph is a straight line that passes through the origin of the graph. The origin is the point on the graph where the horizontal and vertical axes intersect.

www.reference.com/world-view/constant-rate-change-ce8712a854758603

The constant rate of change is a predictable rate at which a given variable alters over a certain period of time. For example, if a car gains 5 miles per hour every 10 seconds, then "5 miles per hour per 10 seconds" would be the constant rate of change.

www.reference.com/business-finance/variation-order-30dcdacd0e7a7348

A variation order is a change, often in construction, that modifies all or part of an existing order. Many construction projects undergo changes, especially after the beginning of building, and the cost impact on a construction project with a variation order can be costly.

www.reference.com/article/natural-variation-c6cacbed6f186cf1

Natural variations, also known as genetic variations, are mutations that randomly occur during sex cell division. These variations lead to different phenotypes that change an offspring's ability to survive and reach sexual maturity.

www.reference.com/science/constant-speed-b0b3d2fead1b8d35

"Constant speed" is speed maintained consistently over time. To achieve constant speed, an object has to cover an equal distance for equal intervals of time. The acceleration of the object is zero when it is traveling at a constant speed.

www.reference.com/article/calculate-magnitude-direction-8ac03e17f5ce5772

Vectors are important tools used to illustrate movement and elements, such as force in physics. In order to work with vectors, you have to understand how to find their direction and magnitude. In many cases, materials like grid paper, a protractor, a ruler, and a calculator are necessary.