Describe Proportional Relationships

Describe Proportional Relationships

Unit 5, Page 31

Multiple Choice

Is this a function?

(The x values do not repeat, but the y values do.)

• Yes

• No

Multiple Choice

Is this relationship proportional?

• Yes

• No

Things to Remember:

• Rate of Change and Slope are always the same

• The Constant of Proportionality will also be the same as the Rate of Change and Slope when the relationship is proportional.

• k = Constant of Proportionality

Multiple Choice

What is the formula for finding slope?

• 
  

  $\frac{y_2\ -\ y_1}{x_2\ -\ x_1}$

• $\frac{x_2\ -\ x_1}{y_2\ -\ y_1}$
  

Multiple Choice

Which would you use to find the rate of change?

• Change in x

  Change in y

• Change in y

  Change in x

Multiple Choice

Which formula is used to find the constant of proportionality?

• $k\ =\ \frac{y}{x}$

• $k\ =\ \frac{x}{y}$

Multiple Choice

True of False?

The rate of change and slope are always the same.

• True

• False

Multiple Choice

What is the constant of proportionality (k)?

• k = 10

• k = 0.1

Multiple Choice

What is the rate of change?

• 3

• -3

Multiple Choice

What is the slope?

Hint:
Cups of Sugar =  x
Cups of Flour = y

• $\frac{2}{5}$

• $\frac{5}{2}$

Multiple Choice

What is the equation?

• y = 0.5x       

• y = 2x

Multiple Choice

What is the equation?

• y = 0.25x

• y = 4x