Mathematics
Grade 8
15 min
Graphing integers
Graphing integers
Tutorial Preview
1
Introduction & Learning Objectives
Learning Objectives
Identify and locate positive and negative integers on a number line.
Plot single integers accurately on a number line.
Graph ordered pairs of integers (x, y) on a coordinate plane.
Identify the x-coordinate and y-coordinate of a given point on a coordinate plane.
Determine the quadrant in which a graphed integer point lies.
Understand how to use a number line to compare and order integers.
Ever wondered how we can visually represent numbers that go below zero, like temperatures or debt? 📉
In this lesson, you'll discover how to graph integers on both a number line and a coordinate plane. This skill is fundamental for understanding more complex mathematical concepts like linear functions and systems of equations, which you'll encounter later in...
2
Key Concepts & Vocabulary
TermDefinitionExample
IntegerAny whole number (positive, negative, or zero).Examples of integers include -3, 0, 5, -100, and 27.
Number LineA straight line with numbers placed at equal intervals along its length, used to visualize the order and position of numbers.A horizontal line with 0 in the center, positive numbers to the right, and negative numbers to the left.
OriginThe starting point on a number line (0) or the intersection of the x-axis and y-axis on a coordinate plane (0,0).The point where the x and y axes cross on a graph.
Coordinate PlaneA two-dimensional surface formed by two perpendicular number lines (axes) that intersect at the origin, used for graphing ordered pairs.A grid system, often seen on graph paper, with an x-axis and a y-axis.
x-axisThe horizontal number line on...
3
Core Formulas
Graphing an Integer on a Number Line
To graph an integer $n$ on a number line, locate the position corresponding to $n$ and place a dot on the line at that point.
Positive integers are located to the right of 0, while negative integers are located to the left of 0. The distance from 0 represents the absolute value of the integer.
Graphing an Ordered Pair on a Coordinate Plane
To graph an ordered pair $(x, y)$, start at the origin $(0,0)$. Move horizontally $x$ units (right for positive $x$, left for negative $x$). Then, from that position, move vertically $y$ units (up for positive $y$, down for negative $y$). Place a dot at the final location.
The x-coordinate tells you how far to move along the x-axis, and the y-coordinate tells you how far to move along the y-axis. Always...
5 more steps in this tutorial
Sign up free to access the complete tutorial with worked examples and practice.
Sign Up Free to ContinueSample Practice Questions
Challenging
A point starts at P(-2, 5). It is then moved 6 units to the right and 8 units down. What are the coordinates of its new position, and in which quadrant does it now lie?
A.(-8, -3), Quadrant III
B.(4, -3), Quadrant IV
C.(4, 13), Quadrant I
D.(-8, 13), Quadrant II
Challenging
The point (k, -4) lies in Quadrant III. Which of the following statements about the integer k must be true?
A.k is a negative integer.
B.k is a positive integer.
C.k must be equal to -4.
D.k must be equal to 0.
Challenging
Point A is at (-5, 3). Point B is located 7 units to the right of and 6 units below Point A. What are the coordinates of Point B, and in which quadrant is it located?
A.(2, 9), Quadrant I
B.(-12, -3), Quadrant III
C.(-12, 9), Quadrant II
D.(2, -3), Quadrant IV
Want to practice and check your answers?
Sign up to access all questions with instant feedback, explanations, and progress tracking.
Start Practicing Free