Alg1 7.8 Point-Slope Form

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Alg1 7.8 Point-Slope Form

  1. 1. Algebra 1 Lesson 7.8 Point-Slope Form
  2. 2. Table Discussion Standard Form Slope-Intercept Form Slope
  3. 3. Given Tool
  4. 4. slope y-intercept x-intercept point point point Slope Formula SlopeIntercept Form Standard Form ?
  5. 5. Ultimate Goal: With given information... Know the name of the line, and be able to graph it
  6. 6. y = mx + b y = mx + b
  7. 7. Slope Formula Slope-Intercept Form Standard Form Point-Slope Form
  8. 8. Variations of Point-Slope Form: y - y1 = m(x - x1) y - y0 = m(x - x0) y - y = m(x - x )
  9. 9. Given: point: (-1,3) slope: 3 y - y1 = m(x - x1)
  10. 10. Given: Given: point: (-3,-1) slope: 2 point: (-4,-3) slope: 2 y - y1 = m(x - x1) y - y1 = m(x - x1)
  11. 11. DO IT BACKWARDS! Given: Point-Slope form, Find: slope & point
  12. 12. BACKWARDS! y - y1 = m(x - x1) y-3 Slope: 3 = 4 (x + 2) Point:
  13. 13. You're Turn: y+4 Slope: 1 = 2 (x Point: "Your" - 9) SMOTD
  14. 14. A DJ Company charges a $200 set-up fee, then $50 per hour. The table below represents the cost per hour including the set-up fee. Hour(x) 1 2 3 4 5 6 Cost(y) 250 300 350 400 450 500 y - y1 = m(x - x1)
  15. 15. http://www.youtube.com/watch?v=DWw-g5F6NgM 4:57
  16. 16. Homework:

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