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Sagot :
Usando una función lineal, se encuentra que el pago es:
C) 46
Una funcion lineal tiene el seguiente formato:
[tex]y = ax + b[/tex]
En que:
- a eres lá inclinacion, o sea, la taja de cambio.
- b eres el intercepto, o sea, el valor de y cuando x = 0.
En la gráfica, hay los puntos (0,20) y (5, 60), por eso:
- El intercepto es [tex]b = 20[/tex]
La taja es dada por el cambio en y dividido por el cambio en x, o sea:
[tex]a = \frac{60 - 20}{5 - 0} = 8[/tex]
Por eso:
[tex]y = 8x + 20[/tex]
Con 3 horas y 15 minutos, el tiempo es de 3.25 horas, puesto que [tex]\frac{15}{60} = 0.25[/tex], por eso:
[tex]y = 8(3.25) + 20 = 46[/tex]
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