Select the correct answer from each drop-down menu. Consider the following exponential function. f(x)= 4^x-3 As the value of x decreases, the value of f(x) approaches . The graph of function f crosses the y-axis at the point . The graph of function f crosses the x-axis between the x-values of .

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?