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#### Description Of Number Line And Identify Points On a Number Line

Referencing Styles : APA | Pages : 1

### Number line

A number line with numbers positioned at equal times or sections over their length can also be described in mathematics as a straight line. A number line can be expanded infinitely and usually horizontally in any direction. As we advance from left to right and reduce from right to left, the numbers increase on a line.

Here, fractions and decimals have been represented on the number line.

A line of numbers can also be used for positive as well as negative integer. It is simpler to type numbers on a number line. Left numbers are lower than that are shown  on the right hand side of the number line. Addition, subtraction and multiplication can also be performed on a number line. We migrate to the right, switch to the left and avoid multiplying the count. A line under which numbers are marked at intervals for easy numerical transactions is known as the number line.

In simple mathematics, a number line seems to be an abstract image of the graduated line for real numbers, which is called. Each row point shall correspond to a actual number and each real number to a certain point.

The entries are frequently displayed in an equal row as specially marked points. Although only the integer values of −9-9 can be seen in this picture, the line covers all true numbers and continues in each direction indefinitely. It is often used as a teaching aid to easy addition and subtraction, with adverse figures in particular.

In sophisticated mathematics, actual numbers or actual lines are usually used to state that almost every point on a straight line leads to a single true number, and vice versa.

### Drawing the number line:

A line of numbers is generally depicted horizontally but the vertical axis (y-axis) is also a line of number on a Cartesian coordinate plane. Positive figures are always on the correct hand of zero, adverse figures are at the left side of zero in accordance with one convention, with arrowheads on both sides of the line indicating that the line is still on the positive and negative direction permanently. There is only one arrowhead used in a convention that shows the way numbers are growing. In accordance with geometry rules, a line without endpoints is defined as the infinite line, a line with one endpoint and a line with two endpoints as a line. It is definitively continuous in the positive and negative directions.

### Comparing numbers:

If a certain number on the numeric row is more correct than a different number, the first number is more than the second number (equivalently, the second is less than the first). It measures the first figure minus the second or equals the absolute value of the second number minus the first. the distance between them is the magnitude. The method of subtraction is to take this distinction.

The distance of a line segment between 0 and a certain other number thus for instance reflects the size of the latter number.

You can add two digits by "pick up" the distance from 0 to one of those numbers and put this again on top of the other number with the end of 0. As in this example, two numbers can be multiplied: to multiply 5 by 3, note that this is equal to 5 + 5 + 5; then, take the length from 0 to 5 and place it to the right of 5, then retake that length and position it to the right of the previous result. This results in a combined length of three times five; since the method finishes at 15, 5= 3= 15.

As in this instance, division can be carried out as follows: Divide 6 by 2 — that is to see how many times 2 is divided into 6 — note that the distance from 0 to 2 lies at the start of the length from 0 to 6 , after taking the first length and bringing it back straight from its initial place, at the end of which formerly 0 is now divided into 2, then move it to the right from its recent position again. This makes the correct end of length 2 from 0 to 6 at the correct end of length. As the length 6 has been completed in three lengths of 2, 2 is three times (that is, 6 ÷ 2 = 3).

### Portions of the number line:

The closed interval [a,b].

An interval is called the number line section between two digits. If the section contains both numbers which is said to be a closed interval, whereas if both numbers are excluded it is referred to as an open interval. It is called a half-open interval if it contains one of the numbers but not the other. All the points extending forever in one direction from a particular point are together known as a ray. If the ray includes the particular point, it is a closed ray; otherwise it is an open ray.

Logarithmic scale:

The range between two points on the number line is the unit length only if and only if the distinction between the figures is equivalent to 1. It is feasible to make other decisions. One of the most common choices, if the ratio of represented numbers is a fixed value, is a logarithmic dimension which is a representation of positive numbers on a line, so that the distance between two points is the unit length. The source reflects 1 in such a logarithmic scale; one inch to the right, one has 10, one inch to the right of 10 one has 10×10 = 100, then 10×100 = 1000 = 103, then 10×1000 = 10,000 = 104, etc. Similarly, one inch to the left of 1, one has 1/10 = 10–1, then 1/100 = 10–2, etc.

This strategy is helpful if values of very distinct magnitude can be represented on the same figure. For example, one needs to have a logarithmic scale to simultaneously represent a photographic, electron, atom, molecule, human, Earth, solar system, and visible universe in various bodies that exist in the Universe. Logarithmic scales are used by adding or subtracting logarithmic scale lengths in slide rules for multiplying or dividing numbers.

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