A horizontal line is a straight line that runs from left to right or right to left with a slope of 0. In other words, the line is parallel to the x-axis and has a constant y-coordinate, so all the points on the line have the same y-coordinate.

The equation of a horizontal line is of the form y = k, where k is the y-coordinate of any point on the line. Since the line is horizontal, the value of y does not change, so it remains constant for all points on the line.

To graph a horizontal line with equation y = k, simply draw a straight line that is parallel to the x-axis and passes through the point (0, k). All the points on the line will have the same y-coordinate, k.

Some key properties of a horizontal line include:

Here are some key points to remember about horizontal lines:

- A horizontal line has a slope of 0 and is parallel to the x-axis.
- The equation of a horizontal line is of the form y = k, where k is the constant y-coordinate.
- To graph a horizontal line, simply draw a straight line parallel to the x-axis with the given y-coordinate.
- Horizontal lines have a y-intercept at (0, k).

Practice graphing and identifying equations of horizontal lines to reinforce your understanding of this concept.

.Study GuideRational numbers and operations Worksheet/Answer key

Rational numbers and operations Worksheet/Answer key

Rational numbers and operations Worksheet/Answer key

Rational numbers and operations

Number and Operations (NCTM)

Understand numbers, ways of representing numbers, relationships among numbers, and number systems.

Work flexibly with fractions, decimals, and percents to solve problems.

Understand meanings of operations and how they relate to one another.

Understand the meaning and effects of arithmetic operations with fractions, decimals, and integers.

Compute fluently and make reasonable estimates.

Select appropriate methods and tools for computing with fractions and decimals from among mental computation, estimation, calculators or computers, and paper and pencil, depending on the situation, and apply the selected methods.

Develop and analyze algorithms for computing with fractions, decimals, and integers and develop fluency in their use.