The regression equation y 56485154 4397403x 4609x2 descri

The regression equation y = - 56,485.154 +4397.403x - 46.09x^2 describes the median income, y, at different ages, x, for residents of a certain country. Complete parts (a) through (c). (a) Graph the equation for values of x between 20 and 70 by evaluating the equation at x = 20, 30, 40, 50, 60, and 70, plotting the points, and connecting the points in a smooth curve. Choose the correct answer below. (b) Is the median income of a resident of this country is higher when an individual is 30 years old or 60 years old? The median income of a resident of this country is higher when an individual is 30 60 years old. (c) How much does median income change from 60 to 70 years of age? The median income increases decreases by $ from 60 to 70 years of age. (Round to the nearest cent as needed.)

Solution

a) Graph D is right

b) Yes higher

c) Decreases