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Warm-Up

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Homework Check

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**Slope and introduction to slope-intercept**

Unit 4 Linear Functions Slope and introduction to slope-intercept

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**An equation whose graph is a line is a Linear Equation**

An equation whose graph is a line is a Linear Equation. Examples of Linear Equations:

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The y-intercept is the y-coordinate of the point where a line crosses the y-axis. Y-intercept: SLOPE: (rate of change)

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Step 1: Write the slope-intercept form equation Step 2: Substitute the given slope or find it given two points Step 3: Substitute the y-intercept from Ex) Write an equation of the line with

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Write the equation of a line that goes through the points (-3, 2) and (-6, 5) with a y-intercept of 7.

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**Write the equation of a line that goes through points (1,5) and (3, 9)**

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**Step 1: Find two points on the graph**

Step 1: Find two points on the graph. Step 2: Find the slope of those points Step 3: Determine the y-intercept Step 4: Write the equation of the line

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**Write an equation of the line:**

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**Write the equation of the line:**

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**Graphing a line given the equation**

Step 1: Graph the y-intercept. Step 2: Using the slope, graph a second point on the line. Step 3: Draw a line through the two points

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**The base pay of a water-delivery person is $210 per week**

The base pay of a water-delivery person is $210 per week. He also earns 20% commission on any sale he makes. The equation t= s relates total earnings t to sales s. Graph the equation.

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Homework

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2.4 Writing the Equation of a Line

2.4 Writing the Equation of a Line

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