Solve the problem.The altitude above sea level of an airplane just after taking off from an airport on a high plateau is given by the linear function y = 800x + 2179, where y is in feet and x is the time in minutes since take-off. Find and interpret the slope and y-intercept.
A. m = 2179; The minutes since take-off increases 2179 for every foot of altitude. 
The minutes that the plane takes to get to the altitude of the airport from sea level.
B. m = 800; The altitude of the airplane increases 800 feet every minute. b = 2179; The altitude of the airport where the airplane took-off is 2179 feet above sea level.
C. m = 2179; The altitude of the airplane increases 2179 feet every minute. b = 2179; The altitude of the airport where the airplane took-off is 800 feet above sea level.
D. m = 800; The minutes since take-off increases 800 for every foot of altitude. 
; The minutes that the plane takes to get to the altitude of the airport from sea level.
Answer: B
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