Scale factor affects different measurements in different ways. What do we do with factors? (What operation do we use-add, subtract, multiply, or divide?) When a scale factor of 3 is applied to a figure, how much bigger is it's perimeter? When a scale factor of 3 is applied to a figure, how much bigger is it's area? When a scale factor of 3 is applied to a figure, how much bigger is it's volume? Why does this happen?

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?