input x 1 2 4 5 6 8 9

output Y 7 9 13 _ _ _ _

I have tried all ways add 6 plus 1
x4 plus 1 add 7 nothing works

how about

y = 2x + 5 ?

wow that work thank you soooo much I have been doing this for 2 hrs thank you for all your help :)

To understand the pattern in the output sequence, let's analyze the relationship between the corresponding numbers in the input and output sequences:

For the given input sequence: x 1 2 4 5 6 8 9
And the output sequence: Y 7 9 13 _ _ _ _

To find the pattern, we need to determine how the output values are obtained from the corresponding input values.

Observing the relationship between the input and output values:

- The first output value is 7, which is obtained by adding 6 to the first input value (1 + 6 = 7).
- The second output value is 9, which is obtained by adding 6 to the second input value (2 + 6 = 9).
- The third output value is 13, which is obtained by adding 6 to the third input value (4 + 6 = 13).

From this analysis, we can see that the pattern is to add 6 to each corresponding input value to obtain the output value.

Let's continue this pattern to find the remaining output values:

- The fourth output value is obtained by adding 6 to the fourth input value (5 + 6 = 11).
- The fifth output value is obtained by adding 6 to the fifth input value (6 + 6 = 12).
- The sixth output value is obtained by adding 6 to the sixth input value (8 + 6 = 14).
- The seventh output value is obtained by adding 6 to the seventh input value (9 + 6 = 15).

Therefore, the missing values in the output sequence are 11, 12, 14, and 15, corresponding to the input values 5, 6, 8, and 9, respectively.

Thus, the completed output sequence is: Y 7 9 13 11 12 14 15.