37.Find the slope of KL.m¬((yx22yx11))¬21227¬019which is undefinedKLis a vertical line, so a line parallel to KLthrough Q(2,4) is also vertical.Draw a vertical line through (2,4).38.Find the slope of DE.m¬((yx22yx11))¬0520¬52Since 52521, the slope of the lineperpendicular to DEthrough W(6, 4) is 52.Start at (6, 4). Move up 5 units and then moveright 2 units. Draw the line through this pointand (6, 4).39.Sample answer: The median age in 1970 isapproximately 28. The median age in 2000 is 35.3.Find the slope of the line through (1970, 28) and(2000, 35.3).m¬((yx22yx11))¬203050.3129870¬73.03¬0.24The annual rate of change is approximately 0.24 year per year.40.Sample answer: Let (x1,y1) (2000, 35.3) andm0.24.m¬((yx22yx11))0.24¬20y1203250.3000.24¬y21035.32.4¬y235.337.7¬y2The median age will be 37.7 in 2010.41.Let (x1,y1)(2000, 35.3) andm13.m¬((yx22yx11))13¬4x02.6203050.3x22000¬3(5.3)x2¬2015.9The median age will be 40.6 in 2016.
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