Proszę o pomoc bo nie umiem : p
ps tylko przykłady c i d
ps2 podajcie też obliczenia

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?

What is the slope of the line that passes through the points (–9, 2) and (0, 4)? the slope of the line is

The amount of data left on the cell phone six gb for 81.5 gb of data is used how much data is available at the beginning of the cycle