List all of the points (r,θ)(r,θ) where the tangent line is horizontal. in entering your answer, list the points starting with the smallest value of rr and limit yourself to 1≤r≤10001≤r≤1000 ( note the restriction on rr! ) and 0≤θ< 2π.0≤θ< 2π. if two or more points share the same value of rr, list those starting with the smallest value of θ.θ. if any blanks are unused, type an upper-case "n" in them.

Which representation has a constant of variation of -2.5

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?

(25 ! ) what does it mean for an equation to have no solution or infinitely many solutions?