Proportions, y=kx, Proportional Relationships

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

What does the equation y = kx represent?

Back

The equation y = kx represents a proportional relationship where k is the constant of proportionality.

Front

What is the constant of proportionality?

Back

The constant of proportionality is the constant value (k) that relates two variables in a proportional relationship.

Front

How can you determine if a relationship is proportional?

Back

A relationship is proportional if it can be represented by a straight line that passes through the origin on a graph.

Front

What is the unit price?

Back

The unit price is the cost per single unit of a product, used to compare prices.

Front

How do you find the unit price of an item?

Back

To find the unit price, divide the total price by the number of units.

Front

If Johnathan saves $25 per month, how much will he save in 6 months?

Back

Johnathan will save $150 in 6 months.

Front

What is the better deal: 10 slices for $2.48 or 12 slices for $3.18?

Back

The better deal is 10 slices for $2.48 (unit price: $0.248 per slice).

Front

What does it mean for a graph to be linear?

Back

A linear graph is a straight line that shows a constant rate of change.

Front

What is the significance of the origin in a proportional graph?

Back

In a proportional graph, the line must pass through the origin (0,0) to indicate that when one variable is zero, the other is also zero.