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Writing Equations from Graphs: Classroom Packet

Grade 8 Algebra: Writing Equations from Graphs

Name: ______________________Date: ____________Score: ____ / 8

Level 1

Positive slopes, y-intercept marked

  1. 1. Write the equation of the line shown:
    1122334455667788xy
  2. 2. Write the equation of the line shown:
    −5−5−4−4−3−3−2−2−1−11122334455xy
  3. 3. Write the equation of the line shown:
    1122334455667788xy
  4. 4. Write the equation of the line shown:
    1122334455667788xy
  5. 5. Write the equation of the line shown:
    −5−5−4−4−3−3−2−2−1−11122334455xy
  6. 6. Write the equation of the line shown:
    1122334455667788xy
  7. 7. Write the equation of the line shown:
    −5−5−4−4−3−3−2−2−1−11122334455xy
  8. 8. Write the equation of the line shown:
    −5−5−4−4−3−3−2−2−1−11122334455xy

Answer Key

Level 1

  1. 1. y=2x+1y = 2x + 1
  2. 2. y=3x−2y = 3x - 2
  3. 3. y=2xy = 2x
  4. 4. y=x+3y = x + 3
  5. 5. y=2x−4y = 2x - 4
  6. 6. y=2x+2y = 2x + 2
  7. 7. y=x−1y = x - 1
  8. 8. y=4x−3y = 4x - 3

Grade 8 Algebra: Writing Equations from Graphs

Name: ______________________Date: ____________Score: ____ / 8

Level 2

Negative, fraction and zero slopes

  1. 1. Write the equation of the line shown:
    1122334455667788xy
  2. 2. Write the equation of the line shown:
    −5−5−4−4−3−3−2−2−1−11122334455xy
  3. 3. Write the equation of the line shown:
    1122334455667788xy
  4. 4. Write the equation of the line shown:
    −5−5−4−4−3−3−2−2−1−11122334455xy
  5. 5. Write the equation of the line shown:
    1122334455667788xy
  6. 6. Write the equation of the line shown:
    −5−5−4−4−3−3−2−2−1−11122334455xy
  7. 7. Write the equation of the line shown:
    −5−5−4−4−3−3−2−2−1−11122334455xy
  8. 8. Write the equation of the line shown:
    1122334455667788xy

Answer Key

Level 2

  1. 1. y=−2x+4y = -2x + 4
  2. 2. y=−3x+1y = -3x + 1
  3. 3. y=12x+2y = \tfrac{1}{2}x + 2
  4. 4. y=23x−1y = \tfrac{2}{3}x - 1
  5. 5. y=−34x+3y = -\tfrac{3}{4}x + 3
  6. 6. y=−23xy = -\tfrac{2}{3}x
  7. 7. y=−2y = -2
  8. 8. y=−2x+5y = -2x + 5

Grade 8 Algebra: Writing Equations from Graphs

Name: ______________________Date: ____________Score: ____ / 8

Level 3

Reading two points anywhere on the line

  1. 1. Write the equation of the line shown:
    −5−5−4−4−3−3−2−2−1−11122334455xy
  2. 2. Write the equation of the line shown:
    −5−5−4−4−3−3−2−2−1−11122334455xy
  3. 3. Write the equation of the line shown:
    −5−5−4−4−3−3−2−2−1−11122334455xy
  4. 4. Write the equation of the line shown:
    −6−6−5−5−4−4−3−3−2−2−1−11122334455xy
  5. 5. Write the equation of the line shown:
    −5−5−4−4−3−3−2−2−1−11122334455xy
  6. 6. Write the equation of the line shown:
    −5−5−4−4−3−3−2−2−1−11122334455xy
  7. 7. Write the equation of the line shown:
    −5−5−4−4−3−3−2−2−1−11122334455xy
  8. 8. Write the equation of the line shown:
    −5−5−4−4−3−3−2−2−1−1112233445566xy

Answer Key

Level 3

  1. 1. y=12xy = \tfrac{1}{2}x
  2. 2. y=−23x+2y = -\tfrac{2}{3}x + 2
  3. 3. y=12x−1y = \tfrac{1}{2}x - 1
  4. 4. y=3x−2y = 3x - 2
  5. 5. y=−34x−1y = -\tfrac{3}{4}x - 1
  6. 6. y=−12x+2y = -\tfrac{1}{2}x + 2
  7. 7. y=23x−2y = \tfrac{2}{3}x - 2
  8. 8. y=2x+3y = 2x + 3