Jen wrote cross-multiplication property for her proportion: x∙ t=u ∙y which of the following could her proportion? choose all that apply. (a) x: u=y: t (b) x: y=u: t (c) x: t=y: u (d) t: y=u: x (e) u: x=t: y (f) x: u=y: t (g) x: y=t: u (h) y: x=t: u hahah i know it's a lot!

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?