Question

find the equation of the regression line for the given data. then construct a scatter plot if the data and draw a regression line. then use the regression equation to predict the value of y for each of the given x values m, if meaningful.

x= 778, 621, 519, 510, 494, 473
y= 51, 47, 44, 43, 39, 37

y=____x + _______

predict the value y for x= 499
"                                      " x= 642
"                                      " x= 802
"                                      " x= 730

Answer 1

The regression equation is y= 0.04*x + 20.617

Value of y corresponding to x = 499 is

y = 0.04*499 + 20.617

y = 40.577

Value of y corresponding to x = 642 is

y = 0.04*642 + 20.617

y = 46.297

Value of y corresponding to x = 802 is not meaningful (Because x = 802 is outside the data range)

Value of y corresponding to x = 730 is

y = 0.04*730 + 20.617

y = 49.817