Table of contents
- 0. Review of College Algebra4h 45m
- 1. Measuring Angles40m
- 2. Trigonometric Functions on Right Triangles2h 5m
- 3. Unit Circle1h 19m
- 4. Graphing Trigonometric Functions1h 19m
- 5. Inverse Trigonometric Functions and Basic Trigonometric Equations1h 41m
- 6. Trigonometric Identities and More Equations2h 34m
- 7. Non-Right Triangles1h 38m
- 8. Vectors2h 25m
- 9. Polar Equations2h 5m
- 10. Parametric Equations1h 6m
- 11. Graphing Complex Numbers1h 7m
0. Review of College Algebra
Basics of Graphing
Problem 21
Textbook Question
Concept Check Graph the points on a coordinate system and identify the quadrant or axis for each point. (3, 2)
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Start by understanding the coordinate system: the horizontal axis is the x-axis and the vertical axis is the y-axis.
Locate the point (3, 2) by moving 3 units to the right along the x-axis because the x-coordinate is positive 3.
From that position, move 2 units up along the y-axis because the y-coordinate is positive 2.
Mark the point where these two movements intersect on the graph.
Identify the quadrant: since both x and y are positive, the point (3, 2) lies in Quadrant I.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Cartesian Coordinate System
The Cartesian coordinate system uses two perpendicular axes, the x-axis (horizontal) and y-axis (vertical), to locate points in a plane. Each point is represented by an ordered pair (x, y), where x indicates horizontal position and y indicates vertical position.
Recommended video:
Intro to Polar Coordinates
Plotting Points
Plotting a point involves moving x units along the x-axis and y units along the y-axis from the origin (0,0). For example, the point (3, 2) is found by moving 3 units right and 2 units up from the origin.
Recommended video:
Graphing Two Variable Equations by Plotting Points
Quadrants and Axes Identification
The coordinate plane is divided into four quadrants based on the signs of x and y values: Quadrant I (+, +), Quadrant II (-, +), Quadrant III (-, -), and Quadrant IV (+, -). Points on the axes have either x=0 or y=0, indicating they lie on the x-axis or y-axis.
Recommended video:
Quadratic Formula
Related Videos
Related Practice
Textbook Question
CONCEPT PREVIEW Fill in the blank(s) to correctly complete each sentence.The circle with center (3, 6)and radius 4 has equation _________.
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