In regression analysis, the coefficient of determination: a. becomes smaller as the fit of the regression line improves. b. is used to determine the proportion of the total variation in the dependent variable (y) explained by the independent variable (x). c. is used to determine the expected value of the net income based on the regression line. d. ranges between negative one and positive one.

answer: a

step-by-step explanation:

if xy ~ yz therefore xy would be the same length as yz

infinitely many solutions

step-by-step explanation:

we have been given the equation;

2(2x + 3) = -4 + 2(2x + 5)

we need to determine the value of x.

2(2x + 3), we expand this expression to obtain 4x + 6

similarly 2(2x + 5) will become 4x + 10

now we have;

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 10 - 4

4x + 6 = 4x + 6

the expression on the left hand side is identical to the one on the right hand side. therefore, we are looking at just a single straight line whose equation is;

y = 4x + 6

consequently, we shall have infinitely many solutions

hello!

some people may think so but i don't. its just a human instinct in my opinion.

have a fantastic day! ~pooch ♥