Exercise
Line Fitting and Data Interpretation Review 2
Further review trend lines, data interpretation, and predictive techniques. Practice evaluating and applying linear models across various problems.
Questions
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MultiChoice
A scatter plot shows a linear model y = -1.2x + 30. What is the value of y when x = 0?
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MultiChoice
What happens to the equation y = mx + b if the scatter plot points shift upward by 5 units vertically?
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MultiChoice
If all data points in a scatter plot lie on the horizontal line y = 7, what is the slope of the best fit line?
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MultiChoice
If data points lie on a vertical line x = 4, what can be said about fitting a linear model y = mx + b?
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MultiChoice
Which of the following lines represents the strongest positive linear relationship?
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MultiChoice
A student calculates a trend line y = 0.5x + 3. For data point (6, 8), what is the predicted value?
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MultiChoice
For data point (6, 8) and predicted value 6 (from y = 0.5x + 3), what is the vertical error (residual)?
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MultiChoice
If a line of best fit overestimates every single data point in a scatter plot, what can be concluded?
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MultiChoice
Which factor most heavily influences whether a linear model is appropriate?
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MultiChoice
In a linear model y = mx + b, if m is positive and b is negative, where does the line cross the y-axis?
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MultiChoice
A line of best fit has equation y = -3x + 15. At what x-value does the line cross the x-axis (y = 0)?
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MultiChoice
If a line of best fit has equation y = 2x + 8, what is the value of x when y = 20?