Suppose y varies directly with x. if y=6 when x=2 find x when y=12

Is it greater than or less than7*3_9*2

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.

The functions f(x) and g(x) are shown in the graph f(x)=x^2 what is g(x) ?