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**Unformatted text preview: **Lesson 17 Graph of an equation in two variables:- the set of all ordered pairs that make the equation true One of the most basic ways to graph an equation in two variables is to use an ¡-chart. Graphing an equation in two variables using an ¢£-chart: 1. Select arbitrary inputs 2. Use the inputs to calculate outputs 3. List the inputs and outputs as ordered pairs 4. Plot the ordered pairs 5. Connect the points Example 1: Graph the following equation using an ¡-chart ¡ ¤ ¥2 ¥ 3 Input Output Ordered Pair ? ? ¦ ? , ? § ? ¤ ¥2¦¥2§ ¥ 3 ? ¤ 4 ¥ 3 ? ¤ 1 ? ¤ ¥2¦¥1§ ¥ 3 ? ¤ 2 ¥ ¥1 ? ¤ ¥2¦0§ ¥ 3 ? ¤ ? ¤ ¥2¦1§ ¥ 3 ? ¤ ¥2 ¥ 3 ¥ 5 The points where a graph touches or crosses an axis are called intercepts. When a graph touches or crosses the -axis, what is the ¡-coordinate of that point? -intercepts are written in the form ¢ ,££££¤ , where is a value on the horizontal number line....

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