Atmospheric air pressure is measured in millibars. Suppose the atmospheric pressure of a weather station, P, in millibars between noon and 9 p.m.
It is represented by the function P(t) = −1.1t + 1,015.7 where t is the number of hours after noon. What is the interpretation of the y-intercept for P(t)
1 answer
The y-intercept of the function P(t) = −1.1t + 1,015.7 is 1,015.7. This represents the atmospheric pressure at noon, which is the starting point of the measurement. Therefore, the interpretation of the y-intercept is that the atmospheric pressure at noon was 1,015.7 millibars.