Horizontal Line
A horizontal line is a straight, level line that runs from left to right. It has a slope of 0 and is always parallel to the x-axis on a coordinate plane.
Equation of a Horizontal Line
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 parallel to the x-axis, the y-coordinate of every point on the line will be the same.
Graphing a Horizontal Line
To graph a horizontal line with equation y = k, simply draw a straight line parallel to the x-axis at the y-coordinate k.
Properties of Horizontal Lines
- A horizontal line has a slope of 0.
- All points on a horizontal line have the same y-coordinate.
- A horizontal line never intersects the y-axis.
Study Guide
Here are some key points to remember about horizontal lines:
- Equation: The equation of a horizontal line is y = k, where k is the y-coordinate.
- Graphing: To graph a horizontal line, draw a straight line parallel to the x-axis at the given y-coordinate.
- Slope: A horizontal line has a slope of 0.
- Properties: All points on a horizontal line have the same y-coordinate, and it never intersects the y-axis.
Practice graphing horizontal lines and solving problems involving their equations to gain a better understanding of this concept.
.◂Math Worksheets and Study Guides Seventh Grade. Applying Percents
Study Guide
Applying Percents 
Worksheet/Answer key
Applying Percents Worksheet/Answer key
Applying Percents Worksheet/Answer key
Applying Percents
Worksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyThe resources above cover the following skills:
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.
Grade 7 Curriculum Focal Points (NCTM)
Number and Operations and Algebra and Geometry: Developing an understanding of and applying proportionality, including similarity
Students extend their work with ratios to develop an understanding of proportionality that they apply to solve single and multi-step problems in numerous contexts. They use ratio and proportionality to solve a wide variety of percent problems, including problems involving discounts, interest, taxes, tips, and percent increase or decrease. They also solve problems about similar objects (including figures) by using scale factors that relate corresponding lengths of the objects or by using the fact that relationships of lengths within an object are preserved in similar objects. Students graph proportional relationships and identify the unit rate as the slope of the related line. They distinguish proportional relationships (y/x = k, or y = kx) from other relationships, including inverse proportionality (xy = k, or y = k/x).