Lesson 17

# Lesson 17 - Lesson 17 Graph of an equation in two variables...

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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

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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. 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 vertical number line.
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