You weren't clear on the equation so I did it both ways. It didn't really matter though because both equations had the same answer. ♀️
Answer:
Option a) u is called the "error term". It is the error we make in prediction
Option d) x is called the independent variable because x is independent from y and u.
Step-by-step explanation:
We are given the following information in the question:

where y is the dependent variable, x is the independent variable.
: It is the value of y when x is zero, that is y-intercept.
: It is the coefficient of x in predicting the dependent variable y.
u is the error term.
- An error term represents the margin of error.
- It refers to the sum of the deviations within the regression line, that is the difference between the predicted value and the observed value of y.
Thus, Option A) u is the error term and Option D) x is called the independent variable because x is independent from y and u are the correct answer.
Answer: 
Step-by-step explanation:
Given:
and 
To find: 
Now as we know

So we have

Therefore d. is the correct option
Hence , 
Answer:
Complementary angles sum to 90°.
<u>∠X has </u><u>∠P </u><u>complementary to it as:</u>
Answer:
4y
Step-by-step explanation:
y - -3y
Subtracting a negative is like adding
y+3y
Combine like terms
4y