Graph the line that represents a proportional relationship between yyy and xxx where the unit rate of change of yyy with respect to xxx is \dfrac{5}{3} 3 5 start fraction, 5, divided by, 3, end fraction . In other words, a change of 111 unit in xxx corresponds to a change of \dfrac{5}{3} 3 5 start fraction, 5, divided by, 3, end fraction units in yyy.

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.