Let x be the age of a licensed driver in years. Lety be the percentage of all fatal accidents (for a givenage) due to failure to yield the right of way. For example, thefirst data pair states that 5% of all fatal accidents of37-year-olds are due to failure to yield the right of way.

x	37	47	57	67	77	87
y	5	8	10	18	29	42

Complete parts (a) through (e), given Σx = 372,Σy = 112, Σx² = 24814,Σy² = 3118, Σxy = 8224, and r≈ 0.955.

(b) Verify the given sums Σx, Σy,Σx², Σy², Σxy, andthe value of the sample correlation coefficient r. (Roundyour value for r to three decimal places.)

Σx =
Σy =
Σx2 =
Σy2 =
Σxy =
r =

(c) Find x, and y. Then find the equation of theleast-squares line  = a + bx. (Roundyour answers for x and y to two decimal places.Round your answers for a and b to three decimalplaces.)

x	=
y	=
	=	+ x

(d) Graph the least-squares line. Be sure to plot the point(x, y) as a point on the line.

(e) Find the value of the coefficient of determinationr². What percentage of the variation iny can be explained by the corresponding variationin x and the least-squares line? What percentage isunexplained? (Round your answer for r²to three decimal places. Round your answers for the percentages toone decimal place.)

r2 =
explained   Â	%
unexplained   Â	%

(f) Predict the percentage of all fatal accidents due to failing toyield the right of way for 70-year-olds. (Round your answer to twodecimal places.)
%