What two numbers multiply to -16 and add up to 0?

-4 and 4

Step-by-step explanation:

Negative x Positive = Negative

-4 x 4 = -16

-4 + 4 = 0

y = 2x

step-by-step explanation:

if you divide each number in the sequence, you'll see that they all have a multiple factor of 2. each number in the series, and any other numbers which may continue, will be multiplied by 2. therefore, y is the next number in the sequence, and x is the current one, so, our formula will be y = 2x.