How do i solve this equation!

Each equation given below describes a parabola. which statement best compares their graphs? x = 2y^2 x = 8y^2

Which graph has figures that can undergo a similarity transformation to justify that they are similar? (obviously not the third one)

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.