Determine whether the sequence is arithmetic or geometric. Sequence 1: -10, 20,
40, 80,
Sequence 2: 15,
5,
25, - 45,
Which of the following statements are true regarding Sequence 1 and Sequence 2.
Both sequences are geometric.
Sequence 2 is anithmetic and Sequence 1 is geometric.
Sequence 1 is arithmetic and Sequence 2 is geometric.
Both sequences are arithmetic.

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

5

step-by-step explanation: