3 geometry questions

1.True or False, y-1=5/9(x-4) is an equation in point-slope form of the line that contains the points (4,1) and (5,4)
2.find the slope of a line perpendicular to the graph of 5x+y=7
a) -5
b) 1/5
c -1/5)
d) 5
3. Find the slope of a line perpendicular to the line containing the points c(-12,11) and d(3,9)
a) 15/2
b) -2/15
c) 2/15
d) -15/2

1. false
2. b
3. a

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http://youtu.be/m2hi3TB3m7U
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