question 16

Find the equation of the regression line for the given data. Then construct a scatter plot of the data and draw the regression line. (The pair of variables have a significant correlation.) Then use the regression equation to predict the value of y for each of the given x-values, if meaningful. The table below shows the heights (in feet) and the number of stories of six notable buildings in a city.

Height,x	772	628	518	508	496	483		(a) x=498 feet	(b) x=648 feet
Stories, y	51	48	46	42	39	38		(c) x=798 feet	(d) x=727 feet

Find the regression equation.

y=___x+ (_____)

(Round the slope to three decimal places as needed. Round the y-intercept to two decimal places as needed.)

question

Find the equation of the regression line for the given data. Then construct a scatter plot of the data and draw the regression line. (The pair of variables have a significant correlation.) Then use the regression equation to predict the value of y for each of the given x-values, if meaningful. The number of hours 6 students spent for a test and their scores on that test are shown below.

Hoursspentstudying,x	1	1	2	4	4	6		(a) x=3 hours	(b) x=4.5 hours
Test score, y	38	43	50	49	65	71		(c) x=15 hours	(d) x=1.5 hours

Find the regression equation.

y=___x+(____)

(Round the slope to three decimal places as needed. Round the y-intercept to two decimal places as needed.)

Question 18

Use the data in the table below to complete

x	4	7	9	11	14	16	19	46
y	27	39	27	31	26	23	24	7

Determine if the point is influential. The change in slope or intercept is significant if it is larger than 10%.The point _____ an influential point because the slopes with the point included and without the point included ____ significantly different, and the intercepts ____significantly different.