Question

Triangle DEF has vertices D(-2,1),E(2,4), and F(3,1) and is dilated by a factor pf 3 using the point (1,1) as the point of dilation. The dilated triangle is names D'E'F'. Using the information to determine the location of D' and F'

Answer 1

D = (1,1) + (-3,0)
E = (1,1) + (1,3)
F = (1,1) + (2,0)
that means
D' = (1,1) + 3*(-3,0) = (1,1)+(-9,0) = (-8,1)
E' = (1,1) + 3*(1,3) = (1,1)+(3,9) = (4,10)
F' = (1,1) + 3*(2,0) = (1,1)+(6,0) = (7,1)