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S.3

Write an Equation from a Graph

Q3 · Feb–Apr

Write y = mx + b for a graphed line from its y-intercept and slope.

Level
Medium
Problems
Daniel Math Academy · Grade 8 Math

Write an Equation from a Graph

Skill S.3 · Slope & linear equations · ★★☆ Medium · Quarter 3

Name
 
Date
 
Score/ 4

Write an equation in slope-intercept form for each line.

Example
xy−6−6−4−4−2−2224466
Equation:

Think: The line crosses the y-axis at −1 and rises 2 for every 1 to the right, so m = 2 and b = −1.

  1. 1
    xy−6−6−4−4−2−2224466(0, 3)(1, −1)
    Equation: 
  2. 2
    xy−6−6−4−4−2−2224466(0, 0)(−1, 1)
    Equation: 
  3. 3
    xy−6−6−4−4−2−2224466(0, 0)(−5, 1)
    Equation: 
  4. 4
    xy−6−6−4−4−2−2224466(0, 0)(3, −5)
    Equation: 
Daniel Math Academy · danielmath.comWorksheet #xscqvef · Page 1 / 2
Daniel Math Academy · Grade 8 Math

Answer Key

S.3 Write an Equation from a Graph · ★★☆ Medium

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Daniel Math Academy · danielmath.comWorksheet #xscqvef · Answer Key · Page 2 / 2

S. Slope & linear equations7 skills

  1. S.1Find the Slope from a Table
  2. S.2Slope & y-Intercept from an Equation
  3. S.3Write an Equation from a Graph
  4. S.4Write Linear Equations
  5. S.5Slopes of Parallel & Perpendicular Lines
  6. S.6Is the Point a Solution?
  7. S.7Slope & Linear Equations Review
Unit review worksheet (all 7 skills)