For the mortality data examined in example 2.2: (a) add another component to the regression in (2.21) that accounts for the particulate count four weeks prior; that is, add pt−4 to the regression in (2.21). state your conclusion. (b) draw a scatterplot matrix of mt, tt, pt and pt−4 and then calculate the pairwise correlations between the series. compare the relationship between mt and pt versus mt and pt−4.

option a.

step-by-step explanation:

if you look closely at the graph, we can notice that the function is not defined at two different points.

if you look at functions b and c, you will notice that both functions are not defined at just one point. the function b is not defined at x= -5/2 and function c is not defined at x=-5. both options are discarded, given that our function should not be defined at two fiferent points.

now, if you look closely at the graph you will notice that the function sketched is not defined at x=5 and x=-2.

the arc length is found by finding the circumference of the full circle (2xpixradius) and then dividing by 4 to find just one quarter of the circle (90 degrees).

130 degrees. i have no other way to explain

what is the question?