Use a graphing calculator to sketch the graph of the quadratic equation, and then state the domain and range. y = x squared + 2 x minus 5
a.
D: all real numbers
R: (y less-than-or-equal-to negative 6)
c.
D: all real numbers
R: (y less-than-or-equal-to negative 5)
b.
D: all real numbers
R: all real numbers
d.
D: all real numbers
R: (y greater-than-or-equal-to negative 6)

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?