Similar to a ruler that can be marked with many different scales such as inches or centimeters, we get to choose the scale of the number line and where the center is. It is similar to a ruler in that it helps us describe and compare numbers. Below is the number line that shows the numbers 70 to 90 and counts by 5's. A number line is a straight horizontal line with numbers placed at even intervals that provides a visual representation of numbers. A number line is just a horizontal line that is used to display all the possible outcomes. Negative Numbers () Positive Numbers (+) (The line continues left and right forever.) A number on the left is less than a number on the right. All the numbers in a sequence can be represented in a number line. Since the range from 70 to 90 is 20, this may be too many numbers to display. Writing numbers down on a Number Line makes it easy to tell. In Maths, number lines are the horizontal straight lines in which the integers are placed in equal intervals. We also have to decide on the spacing of the tick marks. A good idea is to let 70 be on the far left and 90 be on the far right and then plot the points between them. In this example, the numbers are all between 70 and 90, so we certainly don't need to display the number 0. Technically all numbers are on every number line, but that does not mean we show all numbers. When plotting points on a number line, we first have to decide what range of the line we want to show in order to best display the points that appear.
An example of a number line is one that begins with zero and ends with ten, with each segment representing an increasing integer in order. A number line can also include negative numbers. These can be fractions and/or whole numbers laid out in equal segments on a horizontal line. Suppose the five point summary for height in inches for a basketball team is: 72,74,78,83,89. A number line is a visual representation of numbers. The line extends to the right and left of the origin of the line up to the positive and negative infinity respectively. When working with box plots, we need to first set up a number line that labels what is called the five point summary: Minimum, First Quartile, Median, Third Quartile, and Maximum. Number line: A number line is a line that contains all real numbers.
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