Hours (x) 0 1 2 3 4 5
number of bacteria (y) 23 53 123 282 650 1,493

the table shows the growth of a type of bacteria. rounded to the nearest tenth, which equation best models this data?
a) y = 266x - 227
b) y = (23)(2.3)x
c) y = (2.3)(23)x
d) y = 93x2 - 2.037x + 86

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.