Find the scale factor abc def

The scale factor is 1.2.

Step-by-step explanation:

18/15 = 1.2

30/25 = 1.2

24/20 = 1.2

Hope that helps!

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

you can first factor out the n to get n(1+5). we know that 1+5 is 6, so we just have 6n.