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Warm up Write the equation of the line passing through the given point with the given slope. Then graph the line. 1. (-4, -3), m = 2. (8, 2), m =

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Presentation on theme: "Warm up Write the equation of the line passing through the given point with the given slope. Then graph the line. 1. (-4, -3), m = 2. (8, 2), m ="— Presentation transcript:

1 Warm up Write the equation of the line passing through the given point with the given slope. Then graph the line. 1. (-4, -3), m = 2. (8, 2), m =

2 answers 1. Y= ½ x – 1 2. Y= -½ x + 6

3 How do we use Two Points to Write an Equation? Step 1: Find the slope. Step 2: Use one of the points and your slope to solve for b. Step 3: Write your equation in slope- intercept form using slope and y-intercept

4 Example Write an equation for the line through these points. (-1,-5) and (- 2, 3).

5 Your Turn: Write an equation for the line through these points. (1, 3) and (-1, -1) (-1, 6) and (7, -10) (10, -1) and (4, 2) (-14, -2) and (7, 7)

6 Write an equation of the line that has each pair of intercepts x-intercept: (-3,0), y-intercept: (0,6)

7 Your Turn: Write an equation of the line that has an x-intercept of (2,0) and a y-intercept of (0,-5).

8 Part 2: How do write an equation using a table? Step 1: Find the rate of change. (change in Y over change in X) Step 2: Use either point and your slope to solve for b. Step 3: Write your equation in slope- intercept form using slope and y- intercept XY

9 Your Turn: Write in slope-intercept form. XY

10 Review Key Concepts Slope-intercept Form Y = mx + b Ex. Y=-½x + 5 Standard Form Ax + By = C Ex. 2x + 3y= 5

11 Summary: Name the steps for writing an equation from two points?


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