find the slopes of AB, BC, CD, DA
2. slope of line=2/5
y=2/5 x+b
0=2/5 * 5 + b
b=-2
y=2/5 x -2
1. Show that ABCD is a trapezoid.
(A: (-2, 5); B: (4, 5); C: (6,2); D: (2, -1)).
2. Write an equation in slope-intercept form for the line that passes through (5,0) and is perpendicular to the line given by y = -5/2x + 6.
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