In general the air temperature decreases 12 degrees f for every 4000 feet increase in altitude. if a hiker climbs 3000 feet by how much can she expect the temperature to decrease?

Sera sells t-shirts at the beach. she believes the price of a t-shirt and the number of t-shirts sold are related. she has been experimenting with different prices for the t-shirts. she has collected a data set with five pairs of data; each consists of the price of a t-shirt and the number of shirts sold. the independent variable, which will go on the x-axis, is . the dependent variable, which will go on the y-axis, is the