[size=150][b] The formula gives the distance between two points A (x[sub]1[/sub], y[sub]1[/sub]) and B (x[sub]2[/sub], y[sub]2[/sub]),[br][/b] [math]AB=\sqrt{\left(\varkappa_1-\varkappa_2\right)^2+\left(y_1-y_2\right)^2}[/math][/size]

[size=150][b]If the distance between the points A (5, - 2) and B(1, a) is 5,[br][/b][list=1][*][size=150][b]Determine the value a, and show your work on the applet;[/b][/size][/*][*][b]Please locate points A and B on the coordinate plane.[/b][/*][*][b]Display the distance line between A and B on the coordinate plane;[/b][/*][/list][/size]