The least common denominator is used to find equivalent fractions. First, determine the missing factor by dividing the least common denominator by the original denominator. 5
x = 12 ) 144 ¯
12
144

7
x = 16 ) 144 ¯
16
144

1
x = 18 ) 144 ¯
18
144

40 POINTS!!

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?