Given the line of best fit for a data set of data points with the equation y=5x-2.5,what is the residual for the point (4,13)
1 answer:
Answer:
-4.5
Step-by-step explanation:
The predicted value from the model is calculated by substituting x with 4 in the regression equation;
y = 5(4) - 2.5
y = 17.5
The actual value when x is 4 is given as 13. The residual is simply the difference between the actual and the predicted value;
residual = actual value - predicted value
residual = 13 - 17.5
residual = -4.5
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