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Published byMagdalene Cordelia Scott Modified over 6 years ago

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Graphing Equations

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Given an equation, student will be able to Graph the equation of the line with 80% accuracy. Identify slope and y-intercept with 100% accuracy. Plot y-intercept coordinate with 100% accuracy. Student Objectives

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Materials Needed for Today Please have the following on your desk: Graphing paper Ruler Graphing calculator Two handouts found on the assignment table

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Review

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Quick Reminder When slope is positive: When slope is negative: When slope is zero:

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Five Steps to Graph an Equation Step 1: Put the formula in y-intercept form. Step 2: Identify the slope and y-intercept coordinates. Step 3: Plot y-intercept coordinates. Step 4: Use slope to find a new point on graph. Step 5: Connect the two points. Check with graphing calculator.

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Example 1

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Continued Step 3: Plot y-intercept coordinates. Step 4: Use slope to find a new point on graph. Step 5: Connect the two points. Check with graphing calculator. y-intercept (0,-3) (1,-1)

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Example 2 Step 2: Identify the slope and y- intercept coordinates. Slope = 1 y-intercept coordinates (0, 2)

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Continued Step 3: Plot y-intercept coordinates. Step 4: Use slope to find a new point on graph. Step 5: Connect the two points. Check with graphing calculator. y-intercept (0,2)(1,3)

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Example 3

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Continued Step 3: Plot y-intercept coordinates. Step 4: Use slope to find a new point on graph. Step 5: Connect the two points. Check with graphing calculator. y-intercept (0,3) (4,0)

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Example 4

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Continued Step 3: Plot y-intercept coordinates. Step 4: Use slope to find a new point on graph. Step 5: Connect the two points. Check with graphing calculator. (1,3)

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Online Resources National Library of Virtual Manipulatives National Library of Virtual Manipulatives

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Continued Equation Grapher Equation Grapher

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Summary Remember the five steps to graph an equation: Step 1: Put the formula in y-intercept form. Step 2: Identify the slope and y-intercept coordinates. Step 3: Plot y-intercept coordinates. Step 4: Use slope to find a new point on graph. Step 5: Connect the two points. Check with graphing calculator.

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Assignment Complete the page titled “Graphing Equations Practice” for homework. Assignment will be due tomorrow.

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Questions?

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Extra Credit Opportunity

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