8.EE.5: Constant of Proportionality

Front

What is the constant of proportionality?

Back

The constant of proportionality is the constant value (k) that relates two proportional quantities, represented in the equation y = kx.

Front

Find the unit rate: 18 orders in 3 days = ________ orders per day

Back

6 orders per day.

Front

True or False: The horizontal axis is the y-axis.

Back

False. The horizontal axis is the x-axis.

Front

If Justin ordered 5 ice cream bars for $12.25, how much was each ice cream bar?

Back

Each ice cream bar costs $2.45.

Front

The constant of proportionality in the equation y = ½x is _______.

Back

1/2.

Front

What does it mean for two quantities to be proportional?

Back

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

Front

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

Back

Divide the output value (y) by the input value (x) for any pair of corresponding values.

Front

What is the formula for finding the unit rate?

Back

Unit rate = Total quantity / Number of units.

Front

If y = 3x, what is the constant of proportionality?

Back

The constant of proportionality is 3.

Front

What is the relationship between the constant of proportionality and slope in a graph?

Back

The constant of proportionality is equal to the slope of the line in a graph of proportional relationships.