Which rational function models the time, y, in hours, that it takes the train to travel between the two cities at an average speed of x miles per hour?

y= x/6.4
y= x/160
y= 6.4/x
y= 160/x

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form [tex]k=\frac{y}{x}[/tex] or [tex]y=kx[/tex]

In this problem, we have a proportional relationship between the average speed (x) and the time (y)

Find the constant of proportionality k

Fox =32, y=5

[tex]k=\frac{5}{32}[/tex]

substitute

[tex]y=\frac{5}{32}x[/tex]

we have

[tex]\frac{5}{32}=\frac{1}{6.4}[/tex]

therefore

[tex]y=\frac{x}{6.4}[/tex]

ih4tey0utube ih4tey0utube · Answer 2 · 2021-03-02T06:44:30+01:00

ih4tey0utube ih4tey0utube

02-03-2021

Answer:

y=160/x

Step-by-step explanation:

other answer is wrong. i just did this question

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Which rational function models the time, y, in hours, that it takes the train to travel between the two cities at an average speed of x miles per hour? y= x/6.4 y= x/160 y= 6.4/x y= 160/x​

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Which rational function models the time, y, in hours, that it takes the train to travel between the two cities at an average speed of x miles per hour?

y= x/6.4
y= x/160
y= 6.4/x
y= 160/x