Everyone, welcome back. So, up until now, we've seen how to graph an individual inequality, something that looks like this. The basic idea was that we would draw this inequality and test the points, and then we would shade the area, an area that makes that inequality true with those points. But now, we're actually going to see some problems that have multiple inequalities. And in this case, what we're going to do is we're just going to repeat this process over and over again, go through the same list of steps that we have for as many inequalities as we have. Now we're going to see something interesting that happens. So, for example, if I were to graph this inequality and, let's say, it just looks something like this, what we're going to see is that when we graph this inequality where our shading area is going to overlap with the shading area of the first graph. And what we're going to see here is that there's going to be this one region where all of the shadings will overlap, and this will be the solution to the system of inequalities. So the whole idea here is that to graph a system of inequalities, you're going to plot all the lines, all the curves, and shade the regions making points or, containing points that make all of the inequalities true. And to do this, we're going to use different colors and different styles of shading. You can do this however you want, basically shading each curve first. And then later on, we'll find the overlap. So let me go ahead and just break this down for you. We'll follow this list of steps here. Let's take a look at our first example. We've got
Table of contents
- 0. Fundamental Concepts of Algebra3h 29m
- 1. Equations and Inequalities3h 27m
- 2. Graphs1h 43m
- 3. Functions & Graphs2h 17m
- 4. Polynomial Functions1h 54m
- 5. Rational Functions1h 23m
- 6. Exponential and Logarithmic Functions2h 28m
- 7. Measuring Angles39m
- 8. Trigonometric Functions on Right Triangles2h 5m
- 9. Unit Circle1h 19m
- 10. Graphing Trigonometric Functions1h 19m
- 11. Inverse Trigonometric Functions and Basic Trig Equations1h 41m
- 12. Trigonometric Identities 2h 34m
- 13. Non-Right Triangles1h 38m
- 14. Vectors2h 25m
- 15. Polar Equations2h 5m
- 16. Parametric Equations1h 6m
- 17. Graphing Complex Numbers1h 7m
- 18. Systems of Equations and Matrices1h 6m
- 19. Conic Sections2h 36m
- 20. Sequences, Series & Induction1h 15m
- 21. Combinatorics and Probability1h 45m
- 22. Limits & Continuity1h 49m
- 23. Intro to Derivatives & Area Under the Curve2h 9m
18. Systems of Equations and Matrices
Graphing Systems of Inequalities
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