Proportional Relationship Unit 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

Identify the equation that does NOT represent a proportional relationship: y = -2x, y = 1/2 x, y = 3x, y = 5x - 7.

Back

y = 5x - 7 does NOT represent a proportional relationship because it has a constant term (-7).

Front

What is the unit cost if 15 pizzas cost $97.50?

Back

The unit cost per pizza is $6.50.

Front

How do you find the constant of proportionality from a graph?

Back

The constant of proportionality (k) can be found by dividing the value of y by the value of x for any point on the line.

Front

If a cashier can serve 2 customers in 8 minutes, how many can he serve in 30 minutes?

Back

He can serve 7.5 customers in 30 minutes.

Front

Write an equation for the table if k=3.

Back

The equation is y = 3x.

Front

What does the constant of proportionality represent?

Back

The constant of proportionality represents the ratio between two proportional quantities.

Front

If y = kx, what does k represent?

Back

k represents the constant of proportionality in the equation y = kx.

Front

How can you determine if two quantities are proportional?

Back

Two quantities are proportional if their ratios are equal.

Front

What is the formula to calculate unit cost?

Back

Unit cost = Total cost / Number of units.