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Common Core Standard 8.SP.A.2 Questions

Know that straight lines are widely used to model relationships between two quantitative variables. For scatter plots that suggest a linear association, informally fit a straight line, and informally assess the model fit by judging the closeness of the data points to the line.

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Grade 8 Line Graphs CCSS: 8.SP.A.2
Grade 8 Line Graphs CCSS: 8.SP.A.2
What would be the slope of a line of best fit?
Scatter Plot 1
  1. [math]1[/math]
  2. [math]4[/math]
  3. [math]1/4[/math]
  4. [math]4/4[/math]
Grade 8 Scatter Plots CCSS: 8.SP.A.2
Which equality has the best line fit for the data shown below?
x - 0, 1, 2, 3, 4
y - 0, 3, 6, 9, 12
  1. [math]y=x+3[/math]
  2. [math]y=3x[/math]
  3. [math]y=-3x[/math]
  4. [math]y=x-3[/math]
Grade 8 Scatter Plots CCSS: 8.SP.A.2
Which of the equations below best represents the line with the following points?
x - 0, 1, 2, 3, 4
y - 10, 9, 8, 7, 6
  1. [math]y=x+10[/math]
  2. [math]y=-x-10[/math]
  3. [math]y=x-10[/math]
  4. [math]y=-x+10[/math]

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