Does the data in the table represent a direct variation or an inverse variation? write an equation to model the data in the table. x | 2 4 6 8 y | 14 28 42 56 a. direct variation; y=1/7x b. inverse variation; xy=7 c. direct variation; y=7x d. inverse variation; xy=1/7

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.