Math 7: Topic 2 Review

Front

What is a proportional relationship?

Back

A proportional relationship is a relationship between two quantities where the ratio of one quantity to the other is constant.

Front

What does the equation y = kx represent?

Back

This equation represents a proportional relationship where k is the constant of proportionality.

Front

How do you find the constant of proportionality from a table of values?

Back

Divide the y-value by the corresponding x-value for any pair of values. The result should be the same for all pairs.

Front

What does it mean if a graph passes through the origin?

Back

If a graph passes through the origin, it indicates a proportional relationship between the variables.

Front

If y = 9.25x, how much is y when x = 7?

Back

y = 9.25 * 7 = 64.75.

Front

What is the constant of proportionality in the equation y = 22x?

Back

The constant of proportionality is 22.

Front

What does the point (1, 48) represent in a distance-time graph?

Back

It represents 48 miles traveled in 1 hour.

Front

How can you tell if a relationship is not proportional from a graph?

Back

If the graph does not pass through the origin or is not a straight line, it is not proportional.

Front

What is the formula to calculate the total cost for x items at a constant price per item?

Back

The formula is y = kx, where y is the total cost, k is the price per item, and x is the number of items.

Front

What is the significance of the slope in a proportional relationship?

Back

The slope represents the constant of proportionality, indicating how much y changes for a unit change in x.