y = 2x
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.
range is infinite on both x and y axis positive and negative
divide 150 by 100
divide 100 by 1.5
there you go!
decreased by 33.333333334%
taxicab circle radius 9 has 4(9) = 36 points