Using slope/intercept

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Presentation transcript:

Using slope/intercept How do you write a linear function in slope/intercept form from a graph? SPI: 706.3.13

Activator: Identify the slope and the y-intercept from the equation: y = 2/5x + 2

Writing the slope/intercept equation from a graph Step 1: Find the slope. You can count or you can use the slope equation (y2 – y1 / x2 – x1) using the slope equation may be the best choice. Step 2: Find the y-intercept (where the line crosses the y-axis) Step 3: plug your slope and y-intercept into the y=mx + b (m=slope and b= y-intercept) Remember to leave x in the equation

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