Sample quiz on line of best fit
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  1. A straight line that best describes the distribution of points in a scatter plot is usually referred to as $\cdots$?
    correlation line
    line of best fit
    interpolation line
    extrapolation line
  2. A line of best fit can be used for the following except $\cdots$
    look at the strength of a correlation
    estimate other data points
    find an equation that best fits the data
    determine if there is bias in the data
  3. The average value of all the independent variables and the average value of all the dependent variables, when written as an ordered pair $(a,b)$ is known as $\cdots$?
    mean coordinate
    best coordinate
    modal coordinate
    crucial coordinate
  4. Which of the following can be considered a mathematical model?
    graphs
    equations
    diagrams
    all of the above
  5. Find the mean coordinate for the points: $(0,0),(2,1),(3,3),(-2,3),(5,2)$.
    $(4.5,4)$
    $(1.6,1.8)$
    $(4,4.5)$
    $(1.8,1.6)$
  6. Find the mean coordinate for the points: $(-1,-1),(0,0),(2,1),(3,3),(-2,3),(4,6)$
    $(1,2)$
    $(2,1)$
    $(3,6)$
    $(6,3)$
  7. The general direction that a set of data takes is known as $\cdots$
    a correlation
    a survey
    a trend
    a sample
  8. When the depedent variable increases as the independent variable increases, the correlation type is $\cdots$
    one
    zero
    negative
    positive
  9. When the dependent variable decreases as the independent variable increases, the correlation type is $\cdots$
    negative
    positive
    zero
    one
  10. When there is no discernible pattern in a data set, the corresponding correlation is $\cdots$?
    one
    zero
    negative
    positive