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P(-3,-1); Q(3,2)
a=(y2-y1)/(x2-x1)
a= (2-(-1))/(3-(-2))=0,6
b) P(3,4); Q(4,2)
a= (2-4)/(4-3)=-2
c) P(-3,-2); Q(1,5)
a= (5-(-2))/(1-(-3))=1,75
3.
h=18 cm; l=27 cm
a=tgα=h/l= 18/27=2/3