Proportional Relationships

Front

What makes a graph proportional?

Back

A straight line that passes through (0,0).

Front

What is a Ratio?

Back

A comparison of two quantities.

Front

A machine packs boxes at a constant rate of 2/3 a box every 1/2 a minute. What is the number of boxes it packs per minute?

Back

4/3 boxes.

Front

What is the scale factor?

Back

The ratio of the length in a drawing to the actual length.

Front

Scale is 1cm = 8km. Hatboro and Smithville are 24cm apart on the map, what is the actual distance between the 2 cities?

Back

192 km.

Front

What is a proportional relationship?

Back

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

Front

How do you find the unit rate?

Back

Divide the total quantity by the number of units.

Front

What is the constant of proportionality?

Back

The constant ratio in a proportional relationship.

Front

If y is proportional to x, what is the equation that represents this relationship?

Back

y = kx, where k is the constant of proportionality.

Front

What does it mean for two quantities to be directly proportional?

Back

As one quantity increases, the other quantity increases at a constant rate.