Which of the following statements is/are true about the regression equation?

a. We use the symbol Y' instead of just Y to signify that we are dealing with a predicted value, not an actual value.
b. The a in the equation shows where the regression line intersects the vertical y-axis line.
c. The b in the equation shows us the slope we would use as we draw the line moving from our starting point along the y-axis to the right as the line moves higher or lower above the various x-axis values.
d. All of these.


D

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