Writing y = mx + b from Two Points
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Writing y = mx + b from Two Points
Writing the equation of a line from two points worksheet for Grade 8: ten pairs of points, such as (1, 5) and (3, 9). Find the slope and the y-intercept and write y = mx + b. With an answer key.
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- Skill
- Slope Worksheets
- Pages
- 1
- Last updated
- Time
- About 15 minutes
- Answer key
- Included
- Printing
- Black and white
- Related curriculum
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Find the slope of a line from a graph, a table or two points, see the unit rate of a proportional relationship as the slope, and write y = mx and y = mx + b.
Reviewed by Mr. Robert Harrison, Teacher. How we check worksheets
How to use this sheet
- Have the child draw the rise and run on the graph as a small right triangle.
- Say slope as "rise over run" each time, and check the sign: up to the right is positive.
- Have the child find the slope from two different pairs of points and see that it is the same.
Common mistakes
- Putting run over rise, so a slope of 2 becomes 1/2.
- Subtracting the y values in one order and the x values in the other, which gives the wrong sign.
- Reading the wrong scale on the axes when the grid counts by 2s or 5s.
