Estimating Trend Line Equations Exercise

Estimating Trend Line Equations

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Estimating Trend Line Equations

Practice estimating linear equations directly from scatter plots. Develop skills in placing and describing trend lines visually.

Questions

  1. MultiChoice

    A line of best fit crosses the y-axis at (0, 4) and passes through (2, 10). What is its equation?

  2. MultiChoice

    A scatter plot trend line has a y-intercept at (0, 20) and goes down 4 units of y for every 1 unit right of x. What is its equation?

  3. MultiChoice

    If a trend line passes through (1, 5) and (3, 11), what is the slope (m)?

  4. MultiChoice

    If a trend line passes through (1, 5) and (3, 11), what is the y-intercept (b)?

  5. MultiChoice

    Which equation best fits a scatter plot with y-intercept 100 and points (10, 80), (20, 60), (30, 40)?

  6. MultiChoice

    A line of best fit passes through (2, 8) and (6, 20). What is the slope?

  7. MultiChoice

    A scatter plot line has equation y = 0.5x + 5. Where does it cross the y-axis?

  8. MultiChoice

    Two estimated points on a trend line are (0, 15) and (5, 40). What is the rate of change?

  9. MultiChoice

    Which linear equation matches a trend line passing through (0, 50) and (10, 0)?

  10. MultiChoice

    Points (4, 12) and (8, 24) are on a best fit line. What is its equation?

  11. MultiChoice

    What is the slope of a trend line connecting (5, 25) and (15, 75)?

  12. MultiChoice

    If a best fit line equation is y = 1.25x + 3.75, what is the value of y when x = 4?