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2.6 Slope-Intercept Form

# 2.6 Slope-Intercept Form - 2.6SlopeInterceptForm...

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2.6   Slope-Intercept Form Slope-Intercept Form:   y = mx + b  where  m  = slope and  b  =  y-intercept . A linear equation that is solved for  y is the slope-intercept equation and can be graphed without using the xy table. Simply plot the y- intercept (b) on the y-axis; then with the slope, count rise over run to another point on the line.  Count a  second rise over run to get a third point.   Parallel Lines:  If  l 1  // l 2    m 1  = m 2 .   Perpendicular lines: If  l 1    l 2    m 1  =  2 1 m Draw a line that has the given slope and y-intercept: 1. Slope  - 3 / 8 ; y-intercept (0, 5) 2. Slope  5; y-intercept (0, -3) -4 -3 -2 -1 1 2 3 4 -4 -3 -2 -1 1 2 3 4 5 6 7 x y -4 -3 -2 -1 1 2 3 4 5 6 7 -4 -3 -2 -1 1 2 3 4 5 6 7 8 9 x y Find the slope and y-intercept of each line whose equation is given: 3. y – 3 = -8 4. 4x + 3y = 15 5. 5x – y = -7 y = -5 y = - 4 / 3 x + 5

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2.6 Slope-Intercept Form - 2.6SlopeInterceptForm...

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