Answer:
A lurking variable is a variable that has an important effect on the relationship among the variables in the study, but is not one of the explanatory variables studied. Two variables are confounded when their effects on a response variable cannot be distinguished from each other.
The question or the problem ask to calculate or differentiate the said equation and in my own calculation and further formulation about the said equation, I think I would agree and said that the said answer you have given is true. I hope you are satisfied with my answer and feel free to ask for more
You put the 15x + 100 on the angle CEB instead of CED. If you put it in the right spot, it should work out fine since they are vertical angles.
