Fit a regression line to the data shown in the chart, and find the coefficient of correlation for the line. Use the regression line to predict life expectancy in the year 2020, where x is the number of decades after 1900
year, X 0 (1900) 2 (1920) 4 (1940) 6 (1960) 8 (1980)
life expectancy, y 47.9 years 50.2 years 51.8 years 53.0 years 54.0 years

what's the question?

step-by-step explanation:

there is no question.

answer: the distance

step-by-step explanation:

to calculate the distance d of a line segment with endpoints (x1, y1) and (x2, y2) use the formula d (x2 x1)2 (y2 y1)2. to calculate the midpoint of a line segment with endpoints (x1, y1) and (x2, y2) use the formula

answer: 72: 111

step-by-step explanation:

for this case we must apply distributive property to the following expression:

the distributive property states that:

then, when applying the property we have to multiply the -2 for each term within the parenthesis: