Need with select expansion or contraction to correctly describe the type of dilation for each given scale factor.

To know if a dilation is an expansion ( bigger) r a contraction ( smaller) ignore the negative sign.

If the number is larger than 1, it is an expansion, if the number is smaller than 1 it is a contraction.

-4 is an expansion

2.5 is an expansion

2/3 is a contraction

-3/4 is a contraction

1)is not similar since corresponding sides are not in the same ratio

2)are similar since corresponding sides are in the same ratio and corresponding angles are equal

hope it will

#faazmessi