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1) LInear Pair

2) Adjacent (but not a linear pair)

3) Complementary Angles

4) Vertical angles

Step-by-step explanation:

1st pair of angles are linear because they sum to 180 and are on the same line

2nd pair of angles are adjacent but not linear because they're not on a line

3rd pair of angles are complementary because they're neighboring a 90° angle and the three angles share the same line.

4th pair of angles are vertical because they're across from each other.

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.