Posts Tagged ‘proportionality’
Friday, October 30th, 2009
Overview of Hubble’s Law
Description
A detailed tutorial on Hubble’s law. Step by step tutorial including several examples of Hubble’s law including a visual example for reference.
Overview
Hubble’s law states that the velocity at which various galaxies are receding from the Earth is proportional to their distance from us. This law is often expressed by the equation v = H_0 * D, where H_0 is the constant of proportionality (or Hubble constant) between the distance D to a galaxy and its velocity v.
Tags: algebra, constant, distance, equation, galaxy, Hubble, law, observation, proportional, proportionality, velocity
Posted in Algebra | No Comments »
Thursday, October 8th, 2009
Inverse Variation Explained
Description
A detailed tutorial on inverse variation. Step by step tutorial including several examples of inverse variation and what inverse variation is for reference.
Overview
Inverse variation states that two variables are inversely proportional if one of the variables is directly proportional with the multiplicative inverse of the other, or equivilently if their product is a constant. Inverse variation can be expressed mathematically as y = k / x, where x and y are the variables and k is a nonzero constant
Tags: constant, direct, division, inverse, k, Math, multiplicative inverse, non-zero, proportionality, reciprocal, statistics, variable, variation, x, y
Posted in Statistics | No Comments »
Thursday, October 8th, 2009
Direct Variation Explained
Description
A detailed tutorial on direct variation. Step by step tutorial including several examples of direct variation and what direct variation is for reference.
Overview
Direct variation states that given two variables x and y, y is directly proportional to x if there is a non-zero constant k such that y = k * x. The variable k is referred to as the proportionality constant or the constant of proportionality.
Tags: constant, direct, inverse, k, Math, non-zero, proportionality, statistics, variable, variation, x, y
Posted in Statistics | No Comments »
