Slope-Intercept Form

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Vocabulary

• y-Intercept: the point at which a function crosses the y-axis (0, y)

• x-intercept: the point at which a function crosses the x-axis (x , 0)

Slope-Intercept Form

y = mx + b

Slope

y-intercept

Examples

1. Write the equation of the line with a slope of 7/8 and y-intercept at (0, 5).

2. Write the equation of the line that has a y-intercept at -9 and a slope of -1/3.

Writing Equations from Graphs

• Find the slope (rise/run)• Find the y-intercept• Write equation

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