Independent and Dependent Variables, Proportional Relationships

What is the y-axis label?

• Leona's Job Earnings

• Newspapers Delivered

• Total Pay (dollars)

Does this graph represent a proportional relationship?

• Yes, because it doesn't start at the origin (0,0).

• Yes, because it shows a constant rate of change.

• No, because it doesn't start at the origin (0,0).

• No, because it shows a constant rate of change.

Write an equation using the constant of proportionality.

• y = 5x

• y = 4x

• y = 8x

Suzy is participating in a walkathon. She writes the equation m= 3d +50 to represent the amount of money she collects from each sponsor for walking d kilometers. What number represents the rate of change?

• 50

• 3

• 0

• 1

Proportional relationships must go through the origin. (0,0)

• True

• False

What is the rate of change for the following graph?

• 80 mph

• 20 mph

• 40 mph

• 160 mph

Does this table represent a linear relationship?

• yes

• no

What is the x-axis label?

• iPhone Charging Speed

• Time (minutes)

• Capacity (% charged)

• The origin

A ​ ​ ​ (a)   variable changes in response to another variable.

• dependent

• independent

An ​ ​ (a)   variable causes the ​ (b)   variable to change..

• independent

• dependent