How to find where function has point of inflection

Which of the following is most likely the next step in the series? a3z, b6y, c9x, d12w, е15v, f18u

Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 25002500 grams and a standard deviation of 800800 grams while babies born after a gestation period of 40 weeks have a mean weight of 27002700 grams and a standard deviation of 385385 grams. if a 3232-week gestation period baby weighs 21252125 grams and a 4040-week gestation period baby weighs 23252325 grams, find the corresponding z-scores. which baby weighs lessless relative to the gestation period?

The graph shows the amount of money noah earned based on the number of lawns he cut. which list shows the dependent quantities in the graph?