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A ferry is travelling at a constant speed back to the dock, as shown in the graph. Which
function represents the relationship between the distance from the ferry to the dock in miles,
y, and the time that the ferry has been travelling toward the dock in hours, x?

A ferry is travelling at a constant speed back to the dock as shown in the graph Which function represents the relationship between the distance from the ferry class=

Respuesta :

Answer:

c. y = -35*x + 105

Step-by-step explanation:

Lo que demos hacer es calcular los puntos cuando x = 0 y cuando x = 3, es decir el inicio y el fin del recorrido.

Cuando x es igual 0, y = 105, por lo tanto, la función sería:

y = A*x + 105

Cuando x = 3, y = 0, por lo tanto:

0 =  3*A +  105

resolvemos para A:

3*A =  -105

A = -105/3

A =  -35

Por lo tanto la función es:

y = -35*x + 105

es decir, la opción c.