The x axis of each graph has a diameterof a circle in meters label the y axis on each graph with the proper measurement of a circle

What is the measure of ac? 5 units 13 units 26 units 39 units

Average acceleration: i have no idea how to do this.

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?