The relationships are illustrations of proportional equations
Stephano’s marble will reach the 6-foot mark sooner
<h3>How to determine the marble that travels faster</h3>
The equation of Stephano’s marble is represented by:

The equation of the graph of Pete’s marble is represented by:

A proportional linear equation is represented as:

Where:
m represents rate/speed/slope
By comparison, we have:


2.25 is greater than 1.5
Hence, Stephano’s marble will reach the 6-foot mark sooner
Read more about proportional equations at:
brainly.com/question/12242745