A meteorologist is studying the relationship between wind speed and the rate of evaporation of water. It was found that the rate of evaporation increases linearly with wind speed. When the wind speed was 1010 meters per second, the rate of evaporation was measured at 1515 milliliters per hour, and when the wind speed was 1515 meters per second, the rate was measured at 2020 milliliters per hour. Based on this linear relationship, what would be the expected rate of evaporation, in milliliters per hour, when the wind speed is 12.312.3 meters per second?A2.32.3 B12.312.3 C17.317.3 D22.322.3
Question
A meteorologist is studying the relationship between wind speed and the rate of evaporation of water. It was found that the rate of evaporation increases linearly with wind speed. When the wind speed was 1010 meters per second, the rate of evaporation was measured at 1515 milliliters per hour, and when the wind speed was 1515 meters per second, the rate was measured at 2020 milliliters per hour. Based on this linear relationship, what would be the expected rate of evaporation, in milliliters per hour, when the wind speed is 12.312.3 meters per second?A2.32.3 B12.312.3 C17.317.3 D22.322.3
Solution
Para resolver este problema, primero necesitamos encontrar la ecuación de la línea que relaciona la velocidad del viento con la tasa de evaporación. Sabemos que la relación es lineal, por lo que podemos usar la fórmula de la recta , donde es la tasa de evaporación, es la velocidad del viento, es la pendiente de la línea, y es la intersección con el eje .
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Encontrar la pendiente : La pendiente se calcula usando los puntos dados: (10, 15) y (15, 20).
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Encontrar la intersección : Usamos uno de los puntos y la pendiente para encontrar . Usaremos el punto (10, 15).
Así que la ecuación de la línea es:
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Calcular la tasa de evaporación para una velocidad del viento de 12.3 metros por segundo: Sustituimos en la ecuación:
Por lo tanto, la tasa de evaporación esperada cuando la velocidad del viento es de 12.3 metros por segundo es mililitros por hora.
La respuesta correcta es C .
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