Respuesta :

Answer:

[tex]y=4x[/tex]

Step-by-step explanation:

Let

y ----> the distance in miles

x ----> the time in hours

using proportion

[tex]\frac{y}{x}=\frac{(4/5)}{(1/5)}[/tex]

Simplify

[tex]\frac{y}{x}=\frac{4}{1}[/tex]

[tex]y=4x[/tex]

This is a linear direct variation

The unit rate or speed is the slope of the linear equation

The unit rate is 4 miles/hour

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