In this line of circles the eario of red circkles to blue circles is 1:3 how many more red circles would need to be added to make the ratio of red to blue 3:1

8 more red circles

Step-by-step explanation:

Given that

The ratio of red circles to blue circles is 1:3

Now to make the ratio of red to blue i.e. 3:1

or in other words to make the ratio reverse here we have to add eight more red counters

So 8 more red circles would required to be added

6, 10

9, -13

12, -21

18, -23

step-by-step explanation:

you just add 6 to the x-coordinate and subtract 10 from the y-coordinate.