The relationship between altitude and the boiling point of a liquid is linear. At an altitude of 8200 ft the liquid boils at 199.7F At an altitude of 4500ftthe liquid boils at 205 25°F. Write an equation giving the boiling point b of the liquid, in degrees Fahrenheit, in terms of altitude a, in feet. What is the boiling point of the liquid at 2100 ?
Write an equation
(Use integers or decimals for any numbers in the expression.)

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.