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Algebra 1

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- 1. Warm-up Use a graph to identify the slope and y-intercept of each equation. 1. y = -6x 2. y = 3x - 7 3. 4x - y = 5 4. 7x - 3y = 4
- 2. Slope-Intercept Form 4.6 p. 241
- 3. y = mx + b A linear equation y = mx + b is written in slope-intercept form.
- 4. y = mx + b A linear equation y = mx + b is written in slope-intercept form. The slope is m -- whatever number is in front of x.
- 5. y = mx + b A linear equation y = mx + b is written in slope-intercept form. The slope is m -- whatever number is in front of x. The y-intercept is b -- what you would get if you plugged in x=0.
- 6. Slope-Intercept Form To use slope-intercept form, you must write the equation by solving for y.
- 7. Graphing 1. Write the equation in slope-intercept form.
- 8. Graphing 1. Write the equation in slope-intercept form. 2. Plot the y-intercept.
- 9. Graphing 1. Write the equation in slope-intercept form. 2. Plot the y-intercept. 3. Use the slope to plot a second point.
- 10. Graphing 1. Write the equation in slope-intercept form. 2. Plot the y-intercept. 3. Use the slope to plot a second point. 4. Draw a line through the points.
- 11. Parallel lines Two different lines are parallel if they do not intersect.
- 12. Parallel lines Two different lines are parallel if they do not intersect. Two lines are parallel if they have the same slope but different y-intercepts.

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