Answer:
Kids = β(0) + β(1) educ + E
Explanation:
Kids = β(0) + β(1) educ + E
Where "E" stands in for other factors, such as maybe an error in the estimated age of the mother, an error in the predicted income level, or even an error in religion. And we all know for certainty, that whereever education is being discussed, age and income would always be related.