The answer would be 30-10 and if you dove it all the way it would be 20.
Hope this helps.
ANSWER

EXPLANATION
Let

be the equation.
We can choose any two ordered pairs to determine the equation of the relation.

We find m using the formula;


The equation becomes

When x=6, y=15.
This implies that,




The equation of the relation is therefore,

Answer:
A
Step-by-step explanation:
it's a geometric sequence since it is continuously being multiplied by the same number which in this case is 2.
Answer in #1 it ads up by 8