The residual equation for the point ( 4, 13) will be -4.5. so option A is correct.
What is a system of equations?
A system of equations is two or more equations that can be solved to get a unique solution. the power of the equation must be in one degree.
Given regression equation;
y = 5x – 2.5
The predicted value from the model can be 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 given as 13.
The residual is simply the difference between the actual and the predicted value which is;
residual = actual value - predicted value
residual = 13 - 17.5
residual = -4.5
Hence, the residual equation for the point ( 4, 13) will be -4.5. so option A is correct.
Learn more about equations here;
https://brainly.com/question/10413253
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