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Slope-Intercept Form and Graphing Lines for Finding Slope and Intercepts

Learn how to use slope-intercept form to graph lines, find slope and intercepts, and write equations for lines. Includes examples, videos, and practice activities.

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Slope-Intercept Form and Graphing Lines for Finding Slope and Intercepts

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  1. Good Morning! 10.29.18 Head to GOFO! I can use slope-intercept form to graph and find slope and intercepts. 8.EE.6 I can derive the equation y = mx for a line through the origin and the equation y = mx + b for a line intercepting the vertical axis at b.

  2. Agenda *Recap from Friday-especially the quiz *Video *Looking for y-Int and Slopes *Graphing lines with spaghetti *IXL build a Jack-O-Lantern

  3. 10.29.18 BR Determine rational or irrational. 2. 3. 4. Determine the slope:

  4. Quiz Recap

  5. Quiz Recap

  6. Quiz Recap

  7. Learning I can write the equation of a line in slope-intercept form from a graphANDI can graph an equation in slope-intercept form.

  8. y = mx + b Slope y-intercept Slope-Intercept Form https://www.youtube.com/watch?v=TTYKcHJyLN4&safe=active

  9. Slope-Intercept Form y = mx + b Where m= slope b= y-intercept And x & y are the coordinates of a point on the line

  10. y = mx + b Step 1: find y-intercept b= Example #1

  11. Slope-Intercept Form y = mx + b Step 2: count rise/run m= rise = run Run=3 Rise=2

  12. Slope-Intercept Form y = mx + b Step 3: check slope- positive or negative?

  13. Slope-Intercept Form y = mx + b b=1 m= Step 4: fill in the equation

  14. Slope-Intercept Form Step 5: Check by picking a point to see if it is located on the line (a solution) If I choose x=3,

  15. Slope-Intercept Form Step 5: check (3, 3)

  16. Example #2 y=mx+b

  17. Team Time:  Find the y-intercept and slope of each graph and use those to write the equation of the line.

  18. Team Time:  Find the y-intercept and slope of each graph and use those to write the equation of the line.

  19. Team Time:  Find the y-intercept and slope of each graph and use those to write the equation of the line.

  20. Learning I can write the equation of a line in slope-intercept form from a graphANDI can graph an equation in slope-intercept form.

  21. Spaghetti Graphs *Do not break or eat the spaghetti *Begin by placing on the y-intercept. *Rotate the spaghetti until it passes through the correct slope.

  22. Identify the slope and y-intercept. Then graph each line. y = 2x https://www.desmos.com/calculator/zklfwsexde

  23. Identify the slope and y-intercept. Then graph each line. y = x

  24. Identify the slope and y-intercept. Then graph each line. y = – ­x

  25. Identify the slope and y-intercept. Then graph each line. y = – ­x

  26. Identify the slope and y-intercept. Then graph each line. y = x + 4

  27. Identify the slope and y-intercept. Then graph each line. y = -x + 4

  28. Identify the slope and y-intercept. Then graph each line. y = x + 4

  29. Identify the slope and y-intercept. Then graph each line. y = - x + 4

  30. Identify the slope and y-intercept. Then graph each line. y = - 2x +5

  31. Identify the slope and y-intercept. Then graph each line. y = - 2x -5

  32. Identify the slope and y-intercept. Then graph each line. y = 2/3x -1

  33. Practice-Graph these on your own paper

  34. Learning I can write the equation of a line in slope-intercept form from a graphANDI can graph an equation in slope-intercept form.

  35. IXL Build a Jack-o-Lantern Each person needs a sheet of paper to draw the Jac-O-Lantern. When you get to the following checkpoint, you may draw the specified parts. Y.7 Write a linear equation from a slope and y-intercept: 20%- Pumpkin outline 40%-Stem 60%- 1 eye 80%- other eye 100%-Nose Y.6-Graph a line from an equation in slope-intercept form: 20%-Mouth outline 40%-Teeth 60%-Flair 80%-Flair 100%-Color

  36. Exit Ticket

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