A proportional relationship is one in which two quantities increase or decrease at the same rate. This means that when one quantity doubles, the other also doubles. Proportional relationships can be represented by a straight line on a graph, passing through the origin.
For example, the relationship between distance and time traveled at a constant speed is proportional. If you are traveling at a speed of 60 miles per hour, the distance you will travel in 1 hour is 60 miles, and in 2 hours it will be 120 miles. The distance traveled is directly proportional to the time taken to travel that distance at a constant speed.
Describe what makes a proportional. Give an example of a proportional
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