Ii) Cumulative frequencies in a grouped frequency table are useful to find. (A) Mean
(B) Median
(C) Mode
(D) All of these

Data from 2005 for various age groups show that for each $100 increase in the median weekly income for whites, the median weekly income of blacks increases by $105. also, for workers of ages 25 to 54 the median weekly income for whites was $676 and for blacks was $527. (a) let w represent the median weekly income for whites and b the median weekly income for blacks, and write the equation of the line that gives b as a linear function of w. b = (b) when the median weekly income for whites is $760, what does the equation in (a) predict for the median weekly income for blacks?

Which of the following circles have their centers on the x-axis? check all that apply.

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585