Unit 1 - Proportions Test Review 2020

Front

What is a proportional relationship?

Back

A proportional relationship is one where two quantities maintain a constant ratio or rate. For example, if you double one quantity, the other quantity also doubles.

Front

What does it mean if a graph is non-proportional?

Back

A non-proportional graph does not maintain a constant ratio between the x and y values. This means that as one value increases, the other does not increase at a consistent rate.

Front

If a recipe calls for 1.5 cups of milk for every 3 cups of flour, how can you find the amount of milk needed for a different amount of flour?

Back

You can set up a proportion. For example, if you use 5 cups of flour, you can find the amount of milk by using the ratio 1.5/3 = x/5, which gives x = 2.5 cups of milk.

Front

What is the definition of a linear graph?

Back

A linear graph is a graph that forms a straight line, indicating a constant rate of change between the two variables.

Front

What is a non-linear graph?

Back

A non-linear graph is a graph that does not form a straight line, indicating that the rate of change between the two variables is not constant.

Front

How can you determine if a graph is proportional or non-proportional?

Back

You can determine this by checking if the graph passes through the origin (0,0) and if the ratio of y to x remains constant.

Front

What is the formula for finding a missing value in a proportion?

Back

The formula is a/b = c/d, where a and b are known values, and c is the known value for which you want to find d.

Front

What does it mean for two quantities to be in direct proportion?

Back

Two quantities are in direct proportion if one quantity increases, the other quantity increases at a consistent rate, maintaining a constant ratio.

Front

What is an example of a proportional relationship in real life?

Back

An example is the relationship between distance and time when driving at a constant speed. If you drive at 60 miles per hour, the distance traveled is directly proportional to the time spent driving.

Front

What is the significance of the origin in proportional graphs?

Back

The origin (0,0) is significant because proportional graphs always pass through this point, indicating that if there is no input (0), there is no output (0).