A jogger begins her workout by jogging to the park, a distance of 8 miles. She then jogs
home at the same speed, but along a different
route. This return trip is 12 miles, and her time
is one hour longer. Find her jogging speed.
Complete the accompanying chart and use it to
find her jogging speed. Letr be the jogging
speed.

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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?

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