Please help me. there is nothing else 2 say about this question.

Hi Aaron;

distance=(rate)(time)

distance=(12 m/h)(time)

The relationship between distance and time is proportional.

You asked why. This is the reason...

The distance is in miles. The time is in hours.

d miles=(12 miles/hour)(t hours)

Please note that on the right side of the equation, the unit of hours is in the denominator and numerator. It cancels...

d miles=(12 miles/hour)(t hours)

d miles=(12 miles)(t)

The units on both sides are miles. These cancel...

d miles=(12 miles)(t)

d=12t

The reason the two variables are proportional is because of the alignment of the units.