7R Unit 5 Test #5

Front

What is the constant of proportionality?

Back

The constant of proportionality is the constant factor that relates two proportional quantities. It is often represented as 'k' in the equation y = kx.

Front

Write the equation representing the relationship between cost (y) and bags of chips (x) if the constant of proportionality is 0.75.

Back

y = 0.75x

Front

What does it mean for two quantities to be proportional?

Back

Two quantities are proportional if they maintain a constant ratio to each other.

Front

Back

-6x + 15

Front

What is a proportional relationship?

Back

A proportional relationship is one where two quantities increase or decrease at the same rate, maintaining a constant ratio.

Front

Back

x = -2

Front

If Ashley orders books at $9.50 each with a $4.25 shipping fee, how do you write the equation for the total cost?

Back

Total cost = 9.50b + 4.25, where b is the number of books.

Front

How many books did Ashley order if her total cost was $70.75?

Back

7 books

Front

What is the formula for finding the total cost when there is a constant shipping fee?

Back

Total Cost = (Cost per item × Number of items) + Shipping fee.

Front

Back

Combine like terms to simplify the equation.