**Yes.** **The constant is 4** .

two types

Four (4) conditions for natural selection.

Four conditions are needed for natural selection to occur: **reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population**. If they are met, natural selection automatically results.

For example, **humans have different coloured eyes, and dogs have different length tails**. This means that no two members of a species are identical. The differences between the individuals in a species is called variation.

Direct variation is a linear relationship hence, the graph will be a straight line. Further, if two quantities are in direct variation then one will be a constant multiple of the other.

Difference Between Direct Variation and Inverse Variation.

Direct Variation | Inverse Variation |
---|---|

It is expressed as y ∝ x | y ∝ 1 / x |

Combined variation describes **a situation where a variable depends on two (or more) other variables, and varies directly with some of them and varies inversely with others** (when the rest of the variables are held constant).

Indirect variation is **a relation in which the absolute value of one variable gets smaller while the other gets larger**. Indirect variation and direct variation are important concepts to understand when learning equations and interpreting graphs. indirect variation inverse proportion constant of variation.

A variation is **a relation between a set of values of one variable and a set of values of other variables**. Direct variation. In the equation y = mx + b, if m is a nonzero constant and b = 0, then you have the function y = mx (often written y = kx), which is called a direct variation.

Such **relationship with regards to the change in the value of a variable when the values of the related variables change**, is termed as variation. This can be explained by an example of simple equation y = mx where m is a constant. If we assume that the value of m as 5 then the equation becomes as y = 5x.

**Yes.** **The constant is 4** .

**y=x3 is a direct variation**.

**Genetic Variation**

- mutation.
- random mating between organisms.
- random fertilization.
- crossing over (or recombination) between chromatids of homologous chromosomes during meiosis.

**Joint variation occurs when a variable varies directly or inversely with multiple variables**. For instance, if x varies directly with both y and z , we have x=kyz x = k y z . If x varies directly with y and inversely with z , we have x=kyz x = k y z .

Joint variation describes **a situation where one variable depends on two (or more) other variables, and varies directly as each of them when the others are held constant**. We say z varies jointly as x and y if. z=kxy.

Inverse variation means that **a variable is inversely varying with respect to another variable**. It represents the inverse relationship between two quantities. Hence, a variable is inversely proportional to another variable.

1 Answer. Alan P. **x+y=0 is a direct variation**.

Dated : 24-Jun-2022

Category : Education