A process is stationary if: a. any collection of random variables in a sequence is taken and shifted ahead by h time periods, the joint probability distribution remains unchanged. b. there is serial correlation between the error terms of successive time periods and the explanatory variables and the error terms have positive covariance. c. there is no serial correlation between the error terms of successive time periods and the explanatory variables and the error terms have positive covariance. d. any collection of random variables in a sequence is taken and shifted ahead by h time periods; the joint probability distribution changes.

this is a direct variation proportion. y = kx

y is the total amount due, k is the constant of variation, and x is the number of texts sent.

plug in the 3.20 and the 16 to solve for the "k". this is the constant of proportionality. it is the value that will not change.

3.20 = k(16). solving you get $.20 per text.

the equation would then be y = .20x

hi there

the slope is 1/3.

this is because from the y-intercept, you go up one, and you go to the right three, to get to the next exact point on the graph. this is known at the “rise over run.”

p.s. (if you need it).your y-intercept is -2, because that is the point on the graph where the line crosses the y-axis.

hope that : )

what is the question?

2b2t

explanation:

2b2t