Tom and Philip were given the graph of a linear function and asked to find the slope. Tom says that the slope is 1
2
while Philip says that the slope is 2.

Which reason correctly justifies Tom's answer?

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.