Interpreting Graphs of Proportional Relationships

Front

What does the point (1, 50) mean in the context of a graph showing miles driven over time?

Back

For every hour the car can travel 50 miles.

Front

What does the point (5, 250) mean in the context of a graph showing miles driven over time?

Back

In 5 hours a car can drive 250 miles.

Front

What does the point (10, 30) mean in the context of a graph showing the cost of gas?

Back

10 gallons of gas costs $30.

Front

What does the point (0, 0) mean in the context of a graph showing the cost of cookies?

Back

When 0 cookies are purchased, $0 are spent.

Front

Is the number of gallons bought proportional to the cost in a gas station graph?

Back

Yes, it is a proportional relationship.

Front

What is a proportional relationship?

Back

A relationship where two quantities increase or decrease at the same rate.

Front

How can you identify a proportional relationship on a graph?

Back

If the graph is a straight line that passes through the origin.

Front

What does the slope of a line in a proportional relationship represent?

Back

The constant rate of change between the two quantities.

Front

If a car travels 60 miles in 1 hour, what is the rate of travel?

Back

60 miles per hour.

Front

What does the point (2, 100) mean in a graph showing the cost of buying 2 items for $100?

Back

The cost of 2 items is $100.